For example, with a global bet of €1.20 you can buy a bonus with €60. I think that if there is no bonus purchase, in the screenshot the "BUY" icon is displayed.
Why use a VPN? it is not for playing at a casino where your country is restricted. In the event of a withdrawal request, this poses a problem. using a VPN is to play certain games that you cannot play them if you connect with the IP of your country.
I think the casino allows a player to use the VPN if their country is accepted by the casino but cannot play certain games restricted in their country.
But the casino does not allow VPN for players whose countries are not accepted by the casino.