even if they keep acquiring more and more liberty minded people in the same area?
That's a big if.
Plot the data for sign ups and movers to the FSP on a graph.
Then talk to FSP fanatics, and listen to how they scramble away from reality, who go from claiming the numbers don't matter (without providing proof) or go so far as to claim that the numbers will pick up, except they don't have any coherent explanation for how thats going to happen.
Notice how they constantly change the criteria for success to fit with the idea of the FSP, rather than change their opinion of the FSP based on their original criteria for success.
Then find something else to do with your life.