I also use PIA and many of its access points are blocked here. Some are not, but I'd say a majority of the ones I try are blocked. I understand spammers use VPNs but so do millions of legitimate people nowadays. It's kind of throwing out the baby with the bathwater.
Other than Bank of America (occasionally) and Ticketmaster (always), I have zero issues with PIA VPNs being blocked on any other site - and I have it on 3 computers in our house. So somehow most other websites out there seem to manage without blocking one of the most widely used VPN services - wondering why FT can't do the same.