I believe lot of summolings are sitting on sidelines waiting for team to offer one-time bolt on services before jumping on-board. For 2500 syncs, that's just too low. Esp when you consider that most people who visit this website are webmasters. A small email list will easily surpass 2.5k users. The type of limit offered on this deal seem to be targeting off-line/trade businesses, e.g. say an electrician or dental office. I think piesync is missing out on a lot of "potential" business.