We are trying to launch a SE site on Operations Research (OR) and Analytics. We very quickly got the required number of followers and up-voted questions in the Definition phase, and very quickly got 200 committers in the Commitment phase, but the bottleneck is now getting 100 users with 200+ rep points on other SE sites. (I assume this is fairly typical.)
OR-related questions sometimes are asked on other SE sites, especially SO and Math. The question is how to let those users know that a new site, with a potentially better fit, is in the works (and that they might want to commit).
I have thought about, when I answer questions related to OR on those sites, adding a note that says something like, "By the way, this would be a great question for the proposed site on OR & Analytics!"
Is this idea appropriate/acceptable/allowable?
And would it be acceptable to go a bit further, and just add this note as a comment on questions that are already answered or that I cannot answer?