Playmoss  -  the only service capable of creating playlists consisted of Bandcamp tracks, is shutting down…

They wrote about that in their blog:

If you access this resource on a regular base, you may probably noticed a completely new site, and wondering: what is this shit? Well my friend, that means I've finally made up my mind to migrate my blog to the latest platform version.

The new site is clearer, cleaner from dead links and posts, well responsive (mobile friendly), way cooler of course, and hopefully faster.

You may also noticed that, majority of materials previously available, are absent on new site. Those materials are and will always be available on old site, so no worry. Plus, I'll be gradually migrating those publications to the new site.

Completely New Blog