There have been plenty of them on my server. 30-50 i guess (didn't really count) at day 1, and then there has been some here and there after. (and i'm talking 5* 18-19 y/o's worth ALOT, like 5m+ at lvl 3 which is pretty high i think).

I got 3 of them for 5 tokens at the start of the season, just gotta refresh browser alot and they will appear sooner or later