stake is very good and popular gambling site and they provide good original games. So you can go with this. Because stake is quite VPN friendly. So even if it is restricted for your country, you can change location through VPN and enjoy gambling here. However, if you use a VPN, you must avoid large amount deposits. Because there is no guarantee that there will be no trouble suddenly. On the other hand Rollbit can be a good stake alternative so you can also use it if you face any problem using stake.
I don't think there will be too many problems with a big amount of IP change. While there is a multi-account or any type of violation of the gambling site the user may face problems while there is a good amount of returns. Usually there will have no problem until you win a large amount.
The large amount is where problem do come out come and the curiosity of the team could make things severe especially if the account normally makes consecutive winnings. The team might want to know how if the person is real or not where checking the IP address. The use of VPN could be okay but there are VPN that is already leaked so it will be easier for casinos to detect who is using VPN or not. If we are using VPN, we can ensure we use the ones that are reliable and will not exposed our location which might get us ban entirely as a gambler on the casino.