On Steam, the Monster Pack is currently on sale for the first time ever and the Classic Space Pack for the first time in over 4 years.

I don't think anyone's submitted a run with the paid DLCs so far. However, I assume that the DLCs will be on sale more often from now on and might therefore become more common.

I think the DLCs would only have an impact on Observer Builder and Master Builder runs, but I'm open to hear other opinions.

No one has done a Master Builder run. yet...