Re: Pragmatic Play slots or Stake never surprises me for the bad
Well I know that I have said several times that the Pragmatic Play provider in the Stake casino is the worse scam every you will encounter, I have not seen the happenings in that casino in any other casino, this is absolutely not a scam accusation, just sharing my happenings which never seem to happen in another casino so for me the RTP of Pragmatic Play is something that the casino operators can deal with, I know that 0x happens a lot in their buy bonus feature lately in Pragmatic Play but two times in a row 0x in the buy bonus of x100 cost is something horribly new for me 
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No one fault except mine who keeps playing although I don't give a damn as it was the weekly bonus, yet I wanted to share so people know what to expect.
I don't think I have ever seen a pragmatic bonus pay 0x. I think you get a minimum $.60 when you spin into or buy a bonus on $.20. Least that's what I see when I buy Fruit Party, Sweet Bonanza, Starlight Princess, and many others. Even when in the bonus there is usually some sort of minimum hit for 10-20 cents at worst. Regardless I don't suppose hitting nothing or close to nothing makes you feel good. .No one fault except mine who keeps playing although I don't give a damn as it was the weekly bonus, yet I wanted to share so people know what to expect.
I don't think you're only going to encounter that on stake. I've seen bonus buys pay 5-10x on nearly every site I have visited. 1 in every 50 pays huge (not enough to get you even if you bought 50 buys in a row), and most pay 50x or lower mixed with a couple $2-5 of profit. Buying bonuses are a sure way to drain your money. Spinning isn't much better as sometimes it takes 400-500 spins to get in the bonus.
Try a different provider or try the originals. Just mix it up.