Now many free premium VPNs are scattered on Google maybe a lot of people are looking for them and are used for something that must be played in gambling, for example Fortunejack, it is clear that premium VPN will be used a lot and it equals accessing the same platform so it could be called multiple accounts as detected from that IP.
I would not dare to use a VPN which is usually done a lot, but anonymity must be maintained because by paying for sure the IP will be different, therefore it is safer than the premium VPNs scattered on Google.
So this is entirely not the fault of Fortunejack but rather secures more about its use.
A ton of free vpn is scattered on google, just google "free vpn" and you can come up with a ton of them, they do allow you to use them for free and instead of making money from VPN itself, they just give you a free test ride, if you like it you subscribe to them but they allow like a certain limited amount of free vpn and ask you to subscribe if you want more.
For example they do like 5 gb free vpn for you, if you max that you can't use the free anymore, it is like demo, but they do it monthly so that people could come back and not leave forever. There are also forever free vpn types as well but they are usually filled with other stuff and risky so I advice nobody to use it. At the end of the day if you do not pay, you will not get a good product neither, everything that is good costs money.