Like anything if you have no utility for the thing you buy then expecting a profit from buying what you dont need is unusual thinking. In crypto we're all walking on the ceiling and expecting the impossible of course, BTC is some fairy tale come true and a few billionaires and other mainstream cant believe its real.
It could be zero for some people or dare I say some people gained, this varies alot by their usage of the site. There must be some sliding scale, the cashback element is % so somebody very high roller would really ignore the buy in cost to gain that % back.
I wont argue in favor but ignoring it does give some part back after purchase would be unrealistic. The vast majority, the humble plebs want the spins back because we're not the high rollers but experience will vary no doubt. Its a failure in publicity etc. not to give back the spins because it was the one prize for the ordinary user.
Great quote btw