Slot Advantage(?) Play

This is not about blackjack so I'll make it fast, but it is about advantage play, so here goes:

Has anyone tried the St r atosp here's offer to pay you 15% of coin in for 30 minutes of play for new members of their slot club? They pay this whether you win or lose, with the only catch being that the return doesn't become available for a couple of weeks, so you must return to claim it.

It seems to me that if you play a slot that has 85+% return, then this is a positive expectation game (although I may not be thinking about it correctly.) However, they may have a "special" bank of slots which must be used for this offer (which return less than 85%), or may require that the return can only be played in their slots, or some other undisclosed catch.

Although this can only be exploited briefly, I am going to Vegas in a few weeks and I would find it fun to take a break to play this if there is no catch. I would appreciate it if anyone who has tried it would let me know if it's legit. Thanks.

They could lose a lot of money at this unless there is a limit, like $100, on the rebate. I already did their rebate on losses which was their previous deal but I could round up a busload of "friends" to go to Vegas if there was no limit! I think the best play would be the highest limit video poker they have.

this on 101% VP

At that time, it was 110% of your losses refunded up to $110. The promotion was good on any VP or slot.

I broke even, and still got the maximum $ rebate. I know how it happened, but if I disclose it on this board, they may cancel or correct the promotion.

MNBlackjack

Wife and I tried this promo when it was 110% of losses. Be sure to read all the rules. We thought that the promo was for play up to 30 minutes. We got mailers later for rooms but no rebates. When I called to question this they looked at our play and we both stopped at 29 minutes. No margin for error....No appeal!! Still a pretty good promo. Just read all the rules.

Clyde