Missed your message (not getting any notifcations on AG for some reason)
and nope, in fact; I made over 60K spins on Cows, a 20€ +200% deposit would last me around 20K spins
Buffalo on the other hand; Used some freespins (won around 30€, 3 times) - balance went to 0 in the blink of an eye.
and the Full Coin thingy on buffalo: I saw that more often than wins above the 30x.
but well, eventually it's just luck and a good algorithm. (my recent win on Zeus vs. Hades was on the lowest RTP setting, starting balance was 1.4€ from a bonus, made 4000 spins and balance was going upwards only - played on highest RTP now, balance literally zoom'd down to 0 :D)