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Cloudflare took down our website after trying to force us to pay $120000 within 24h
(robindev.substack.com)
This is a most excellent place for technology news and articles.
If it had been a sports betting site OP would have said so. The fact that they said "casino" says it all.
Many do both, I would say the vast majority. Same regulations and licenses apply, in fact. Simply some companies invest more in casino (which are purchased games from vendors in the vast majority of cases), some invest more in sportsbook. I guess the OP's case is the former, but it's not a very relevant distinction to make.