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.
We have been recommending your service to several others - thanks for providing such a simple and effective service! You save me hours every time I use your site.
You have a great product...I LOVE the form generator for collecting emails to put on my site. And the testing process it totally cool. Thanks for such a well thought out product.