Ruined by greed.

It's one thing to introduce a forced disconnect every 30 minutes. That on its own would have been .. maybe not fine, but at least acceptable to me.

However, they now also made it (and it's obvious that this is on purpose!) so that free users cannot simply reconnect after such a forced disconnect has taken place. Instead, they show you some bull message:
"In some cases VPN extensions are not enough to bypass the firewall in your network."
Yeah, right. And it juuust so happens this impenetrable firewall issue starts to come up now? After literally months of working just fine on the same machine and network etc. A likely story. It's literally just more bull from these people trying to nag you into paying, that's all. I for one will not.