I think I have played at only 1 other playtech casino (golden palace)
And I'm certainly not going to be abusing the bonus, going to blow it all on slots
You should not, as this shoud be taken as a warning that the games will begin, and I don't mean the slots.
If they believe you are a "bonus abuser", they are either not going to give you the bonus, or they will confiscate your winnings should you win, and keep your money should you lose.
Since you only played at ONE other Playtech, you know for sure who grassed you up to Playtech, and Golden Palace are rogued.
They may even let you play in dollars, and then confiscate winnings due to you using the "wrong currency".
Maybe I am on the Playtech blacklist too, I have won at nearly every Playtech casino I have tried (not that many), and taken the bonus at each.
Playtech also seem to have the whole of the UK on their blacklist, so it may just be your location that got this response.
My last deposit at Windows was 50, and I got a mere 5 phantom bonus, and was advised to check the terms, so I did, and was horrified - I had to wager 1350 for this 5 PHANTOM bonus on a 50 deposit
Well, it was a case of up yours Windows, and rule Britania, as I managed to both meet WR and cash out 800
If they are having such bad terms for existing players, they have just lost a customer after going to all that effort to persuade me to try their "new software" (they were RTG, but went to Playtech when Wager Junction bought them out).
There are accredited playtech casinos here that may well offer you both a GBP account AND a slots bonus, but ask about your blacklist status first, and see what they say.