Plenty, if you think how many popular casinos have them at full RTP and how much play other slots get.
Dio posted a >2000x one a few weeks back.
Plenty high scores on battles and ST. Plenty big wins on their current leaderboard.
We will never see the 180,000x and their slots hate me for the last 10 months but for many people a 500x-2000x on some of their slots is very easy.
Just to add...
I had 50% RTP on the GR battle just now. I don't know how others do it but look at the damn wins on just a couple of games (that have the potential and take part on the promo) in just a few days. 245 people got 1000x or above!