I'm definitely not an expert, but I've been using Whatbox for many years without any issues. I'm based in the US and have it set up to autocharge the same card that I use for everything else. I do not use a VPN or anything else to access Whatbox.
I have received plenty of DMCA notices from Whatbox over the years, and they just require you to delete the offending content within 24 hours or your account will be locked until you do.
In fact, I vaguely recall them increasing my storage allowance a few years ago without raising my rate, so that was pretty cool.