Hi there, sorry I'm new here in the community and i just wanted to know if glitches such as: the first aid spray glitch that can help you earn a lot of pesetas in few seconds/minutes was actually allowed (I wanted to develop a strategy for both Any% and NMG that involved this method)

The FAS Glitch is completely allowed for Any% runs only (for either Main Game or Separate Ways) and completely prohibited for NMG runs since its a major glitch. Any attempt of using any of the existent major glitches (such as OOBs, any type of door clip or sniper clips, ammo glitch, etc.) in NMG runs, will make your run to be moved into the Any% leaderboard.

Please dont forget to checkout both game and category rules for more detailed information.