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.
I think you're providing a marvellous service and I'm seriously thinking of swapping one of my larger ezines over to you.
We are thrilled with Ezine Director. It is such an improvement over our previous list manager. Thank you.