Firstly, there is the task of convincing some "elite" group of potential FAI coders that the task is worth doing.

Not all the object-level work that needs to be done is (or requires the same skills as) FAI programming – not to mention the importance of donors and advocates.

This might be a worthy goal if you think that the path of technological development will be significantly influenced by public opinion and politics.

...in a desirable way. Effective SL3 "pro-technology" activism seems like it would be very dangerous. I doubt that advocacy (or any activity other than donation) by people who need detailed predictions to sustain their motivation (not just initiate it) has any significant chance of being useful.