Posting "what??? I'm so CONfUSED!!!1!" every time somebody spams is just as annoying as the actual spam (if not more)
The Arcade Kollection is just a re-release of the older games, so runs for those games just go under the normal leaderboard for the game (so if you're playing Mortal Kombat 2 in the collection, you just submit your run to the MK2 leaderboard).
It really just boils down to trying stuff and seeing what happens. The more stuff you try the more you learn about how the game works, so you get better ideas for what to try next. If enough people try enough things over a long enough period of time you can come up with some pretty interesting stuff.
The rules for this game are pretty barebones. The full-game categories don't mention timing rules, and the level category has nothing. Could someone touch those up? If there's truly nothing else worth mentioning then fair enough, but timing rules are kind of the bare minimum.
If that's the case, each Level in that section of the leaderboard is considered a distinct run, so you do not necessarily need to do multiple Level runs in one sitting to submit for a single level. In the context of Level runs, single-segment simply means completing that level in one sitting. Some games are weird though, so always double check the rules for any games you plan on running.
Speedruns submitted to the leaderboards are always done in one sitting (single-segment) unless the leaderboard rules for a specific game/category explicitly say otherwise, which is very rare these days outside of very long (24+ hour) runs. Runs done in multiple segments (segmented runs) are a thing for normal length runs, but they typically aren't given leaderboards since they're usually more of a "proof of concept" for what's possible in the game rather than something people compete with. Submitting a segmented run to a single-segment leaderboard is a form of cheating.
Not sure what gave you the impression that L4D2 is different, that game's leaderboard is also exclusively single-segment as far as I can tell.
I doubt anyone wants to get seriously invested in multi-game while the series is ongoing. Maybe after Spider-Man 3 comes out (although, just 1+DLC, 2, and Miles 100% would already be well over 20 hours, so probably not even then).
Calling it 400% would be a little strange, in my mind 200% would be NG and NG+ together, so 400% is somewhat ambiguous to me.
Anyway, for this sort of thing there's honestly not much point in adding it (or even talking about adding it) unless somebody actually runs it. 100% is already kinda dead so it's hard to imagine a significantly longer and probably worse category getting any traction.
Generally as long as the video is publicly viewable it should be okay. I would strongly recommend just making a YouTube account if you're at all serious about your runs though, most of the alternatives just kinda suck (Dropbox videos won't embed and you'll run out of space pretty quickly, for example).
Gotta ask, if the game has more levels than you're willing to add manually... do you really need to list them all? I don't know exactly how many levels we're talking about here, but having hundreds of empty categories that will most likely stay empty is generally not great. Would strongly recommend just listing the ones that people actually want to run so the leaderboard doesn't become a huge mess that's impossible to navigate.
There is definitely something that updates it, but it's unclear what. I imagine it's not a bug and it just has weirdly specific requirements to update. I'm not losing any sleep over it personally, but I kinda wonder what the point of even having it there is if it's pretty much guaranteed to be woefully outdated.
It shouldn't have anything to do with any specific game. The only way it would is if the game had an autosplitter, which as far as I can tell SWTOR doesn't.
Generally the creator(s) of a game don't request the leaderboard. The person who requests the leaderboard should be someone who intends to maintain the leaderboard for the game indefinitely. In this case, it would be appropriate for someone from the community for the first game (ideally one of the moderators) to request the sequel. They can do that no more than 3 weeks before the game releases.
Does this happen consistently, or was it a random one-off? It's weird either way, but if it just happened once and never again it was probably a fluke, so I wouldn't worry too much about it.
If something like that happens again, you can use the "undo split" hotkey to get back to where you were, and the timer will continue as if it had never stopped.
In general, if you're not sure if a game is eligible or not, you can submit it and see what happens.
However, in this case it's part of an established series, so the Pokemon series moderator would be responsible for adding it.
Definitely do not agree with that logic, that's like saying looking at your keyboard during a normal speedrun is a tool assist.
There aren't really official rules on how blindfolded runs are supposed to be done, people just use their own judgement for what makes sense. What you're suggesting sounds impractical (unless it's a fairly short or simple game, in which case, do you even need it) but if you can pull it off then I personally would not find it to be objectionable.
I thought that games that were boosted had no ads
I'm not sure how you got this impression, but no, that's not how it works. When you boost a game, 3 individual users (usually active runners of that game, sometimes followers, etc) are semi-randomly chosen and they don't get ads anywhere on the site for one month.
Disabling ads for everyone on a single game page sounds nice, but would certainly not make financial sense for the site owners at all.
Every game has its own rules for this sort of thing, you'll have to check with the specific game you're planning on running.
Generally, pausing the timer is frowned upon for games timed with real-time unless the game's rules say otherwise.
Easiest way to figure it out would be to record gameplay of it for about an hour, and the multiply the size of that video by about 300.