I've been looking for an alternative to the built-in DNN subscription functionality too and am surprised to see that there seems to be very few modules for doing this. The main problem with the built-in subscription functionality is it requries the users to dig around in their profile settings to find the Manage Services area, which is very unintuitive and convoluted. I need to have my own page with a simple subscribe button on it. CodingStaff.com makes a simple one that also sends the email messages for Welcom and Expired messages. The problem is I need one that allows a higher price on the first year and a lower price on every year thereafter and can't find a module that handles that scenario. A trial period that expires after a specified number of days or page hits would be nice too. Can't find that feature either. This is pretty common functionality so I'm surprised not to see a lot of options in this area.