punter_qnorLong time lurker here, so here is what I look at before signing up anywhere. After getting burned once or twice I learned to read the small print first.
I always start with licensing: find the licence number and look it up, because some sites quietly block certain regions. Next come deposits and withdrawals: crypto is a plus but not a must, and the withdrawal limits need to be written clearly.
Never judge a site by the bonus alone. Read the wagering and the max bet rule, and live tables often do not count at all. A decent independent write-up with the current terms is worth a read here [url=https://forum.thewonderweeks.com/member.php?action=profile&uid=349790]rolletto sportsbook[/url] so you know what you are signing up for.
On mobile I mostly use the browser version, so I check how the lobby works on a small screen. Ask support one simple question first: slow or scripted answers usually mean trouble later.
That is about it. Only play with money you can afford to lose.