Casinos don’t rely only on IP addresses or gambling patterns to detect cheaters and multi-accounters.
When it comes to IP addresses, then, as usual, it’s better to read the casino terms as some of them do not accept multiple accounts from the same household.
I don’t know if this applies to Spinly, but you need to reed their terms before making such statements.
You can’t say that using the same IP address as another user to login into the casino is OK without reading the casino's ToS.
It applies to spinly if it's about having one account. It's on their terms of services that every user is only allowed to one account
and likely in a household. So if it's about the same IP addresses and it's detected by them with multiple accounts then, that's punishable by them and might lead to banning. But if it's one account with several IP addresses, that's not a problem at all.
3.21. You have only one account with us and agree to not to open any more accounts with us;