This happens a lot, almost to everyone. You should give it a try to convince the CSAs that this is the right place to invest their time and effort and it won't go wasted for sure. Who knows they might try it and get attracted by SFI. If they don't respond to you after some try then leave them be. Its better to spend your time in those who are really into SFI than to those who don't even wanna know what it is.
