Seems like they are using CGNAT, which means you won’t be able to connect to some peers who are also not connectable due to both closed ports. One must open their port to establish connections.
They can surely remove you from CGNAT but for extra cost. I think paying for seedbox is much cheaper.
iirc they only went private for like what…few weeks not even a month and then back to normal. gog-gamesdotto still recommended in csrin