There is zero privacy using a VPN when they have all your details on file from a credit card transaction. Cryptocurrency is the only private form of payment online period.
These guys are total hypocrites, they will likely be selling your online activity to anyone willing to pay so they stopped accepting crypto because if you pay with crypto they cannot profit from your data easily.
Here is their chatroom if you want to stop by and let them know what you think about this
I was speaking of plausible deniability on the social level not from a criminal perspective.
A VPN would stop them in their tracks because there would be no logs to read except you connecting to the VPN on the ISP side.
You can also use a VPN -> Tor -> VPN in which case it is almost impossible to trace anything unless you examine the whole internet connection map which is thousands of hours of effort.