It is not a fully functioning clone of the piratebay, merely a mirror of the existing site content. There is no login facility, and as such no way to add more torrents, there are also none of the comments and of course no way to add any. The piratebay does not live on through it, but is merely represented in an incomplete historical fashion through it.

There are new torrents up now that aren't on the Costa Rican mirror. I think they've added some ability to add new torrents.

Hopefully not a surprise to anyone here? Pirate Bay was easy to mirror by design - as long as you had the infohashes of the torrents, you had most of what you needed.

(Heck, I had pretty much a complete copy of TPB up to late September 2014; not because I had any interest in mirroring it, but because I wanted to look into Bitcoin use for donations there.)