Yes it is Euro by default but you can change it to USD if I remember it correctly, its been several months since my last play here so I do not really know if there is a change or not. For the free spins bonus, what you shared here is basically the same issue that I experienced and I have to say it is due to restriction by the game provider. What I did to fix it so I could play the free spins, switching my IP through VPN. Since using VPN is not something prohibitted by Casinopunk as they give VPN recommendation, so you may use it in order to play the FS.