I too made a deposit there gofish and yep... it is an RTG
... no real surprises there. i took them up on the freechip and deposit bonus, did real good on the no deposit $25 making the 50x playthrough after about 5 hours play (50x on 25 dollars!!!) and working the 25 up to about 200 where I hovered at nearly the whole time. I decided not to try cashing out and eventually fizzled out and burned. I started at .50 a bet then down to last $10 made a bet on lucky caboose at 1.50 and hit the bonus. That bankrolled the rest of the playthrough run.
On the deposit I kicked in 50 and got a huge 500% match with a 33% playthrough, thats $9,900.. i had 300 to play with, started in at 1.50 to 2.00, lot of ups and downs and played for a bit over 8 hours before crashing and burning with 1400 left to go on the playthrough.
Let me put this out there, 97.5% payout is how often a wager has some kind of return, often small ones that may not even cover the bet, but it is a payout... based on my play, I believe the numbers I was shown as to the frequency of pays.
That said, my impressions of the casino were favorable, my experiences with live support were very helpful and knowing that the opportunity to actually recieve a payout if I were to win are the things i think make the casino stand out a little bit.