Roblox pays very competitively (see levels.fyi). The apparent strategy is to try to hire lots of long-tenured L6+ Googlers (seriously, it's crazy how many former Googlers I work with).
A former mid size company that I worked at had the same scenario and it was definitely not good. They over engineered not just the systems but literally everything else, including the promotion process which involved the whole horse and pony show and was a constant distraction to shipping features while the companys finances struggled.
Looks like a lot who wanted the high pay, but coast along and leverage their past experience to not be dared questioned.
(Btw, some people also leave Google for other reasons.)
This has not been my experience at all.