If you give up on CSAs you lose one of the streams for any kind of incomes. It is not a tragedy CSAs don't respond to your message - more oppresive is her/his passiveness. For such persons I have a maxim - do what you think is right to do and let it happen what have to happen! In a word - try from time to time to "activate" those CSAs , who showes any kind of activit. The rest are "lost" for the SFI business.