Normally, this is true but most the player who want the addon never host with it. In other words i can think of plenty of player- databloacks that have been released that havent been put to good use on others servers
Pretty much this, though it really depends on the playertype. The Dragon and bug playertypes that I've worked on are more general purpose, so keeping them private is pretty silly IMO. While I usually have an intended use for the playertypes, people can easily use them for just about anything. The bugs work well for any sort of post-apocalypse server, and the dragons are dragons.
However the Elemental playertypes are actually bosses for a boss battle server that I plan to host eventually. I don't know about you, but I would hate to release my bosses only to see loads of cookie-cutter boss servers with the same bosses
(Or RP servers *shudder*). That would get stale so quickly. I would much rather see people make their own bosses.
We'll see how things go, though.
Also please keep in mind that the playertypes are not even in a 'release ready' state yet, anyway.
EDIT:(And I just noticed that Shimmer's colors are broken :d (red elemental))
EDIT2: And the attention that these playertypes are getting makes me think that a dev topic for these wouldn't be a bad idea.