You're still providing excellent customer support I see.
I think this is an excellent way to acquire paying customers AND will give many potential users the option to see if they can build a decent subscribership without having to front the $250 or more that would be needed for ListBuilder.
Thanks for this great service. We are a small non profit with a practically non-existent staff, and handling our email list manually has become a huge burden. The pricing of all other services we've looked at is out of our reach.