It seems more likely that subredditstats.com detected that "This data is likely out of date or inaccurate now that Reddit has decided to kill the open ecosystem

It seems more likely that subredditstats.com detected that "This data is likely out of date or inaccurate now that Reddit has decided to kill the open ecosystem that existed around Reddit. I don't earn any money from this site, and if my calculations are correct it'd cost me a couple thousand dollars per month with their new API pricing, so yeah." given that that's what it says in the big wall of red text at the top.