[erehweb]

Hmm. If I understand correctly, the website is a play to get money from Wolt by getting other people to sign up via OPs referral code. Seems kind of arbitragey - OP is not actually selling something, and Google would probably rather get the advertising $ from Wolt directly. So I see where Google's coming from, and think it can reasonably be classified as "Engaging in practices that circumvent or interfere with Google's advertising systems and processes, or attempts to do so" - the examples given are non-exhaustive. Why OPs and not other promo / coupon sites? Who knows - maybe the others add some more value, or maybe G will come for them eventually. (Edit - corrected assumption of OPs gender)

[NmAmDa]

I think the main problem here is that Google don't let you know what went wrong or let you have any actual human you can talk to. This is what makes their decisions seems arbitrary is you have to guess at best why this happened.