I'm using selfhosted wireguard server. Speed about 250 mbps and this VPS costs me about 3$ per month. Super easy to deploy wireguard server using this script
I've never talked to their support team. I suspect that this company just doesn't pay taxes or something like that. I noticed that they accept Russian payment methods (for some users, as stated on their website). I am using the cheapest server and the lscpu command shows the AMD EPYC Milan processor. As far as I can tell, it's a Zen 3 processor, which is pretty cool for the price.