Well, that's a clear answer at least.
Of course, distribution outside SIAI is not the same as putting it in the public domain, so technically you'd not be giving up your intellectual property, it's just about what you allow others to do with it. I can understand SIAI does not want to dillute its brand by having others re-using the exact templates -- but maybe it would be possible to publish a sub-template, something without the SIAI-specifics?
The Singularity Institute has recently made the transition to a LaTeX based document production workflow for its publications and republished its existing research papers. However, there is still much work to be done and we need more remote LaTeX editors. Some projects currently in the queue include converting both The Sequences and Facing the Singularity into LaTeX based books.
As with other remote positions, pay is hourly and starts at $14/hr but will increase if you produce a good product.
Perks: