Set exclusion criteria first
Remove any option whose identity, current terms, location rules or data practices you cannot verify. Never use a VPN or inaccurate personal details to work around a restriction.
Compare like with like
Use the same checklist for each service: rules visibility, payment total cost, withdrawal conditions, account security, support evidence and responsible-gambling controls.
Leave room for no selection
A comparison does not have to end in opening an account. If the legal context, risk, costs or terms remain unclear, the strongest decision may be to stop the search.