If 99,99% of the IPv4 addresses are already "in-use" and if large part of them were already abused somehow, overused and so on, then this means that not alot "good" IPv4 IPs have left (or will end in the coming up months), no matter if they're provided by VPS providers, VPNs providers, Proxies and/or regular ISPs/dongles services.
So therefore when almost no one (00,01%) is using IPv6 IPs (even providing them, huh), and when there're
340 Undecillion possible address combinations (not only 4,3B like IPv4), this means that the chance every single IPv6 IP to be
clear, fine, green, unflagged, good, not abused and overused are better than the IPv4 ones.
So therefore for
advanced people who really understand what they're doing and experts in that, they generally can "buy" lots of IPv6 IPs, place them on a
single VPS, install there OVPN Server and use all of them using the regular OVPN Client, then switching the accs/IPs. Or even better - just installing some kind of Proxy Server software and then on the client PC to get multiple Portable Chromes/Firefoxes with addons for "Proxy:Port" where to add them and use them, so
no more Windows User Accounts switching, no more VPNs, no more multiple VPS purchases, no more everything else. Starting Chrome1, having his own IPv6_IP1 when started, registered on eB/PP and playing their game. Then starting Chrome2 (if the PC is slow, closing CH1 ofc), having his own IPv6_IP2 and so on. That should be the future, not multiple user accs, not multiple IPv4 VPS purchases and/or IPv4 VPNs, proxies and so on.
Hope that you get the idea.