I think you're right. People would like it a lot better if they pay money once and can use Mojo forever.
Sorry if my use of the word "license" was unclear. I'm so used to the word that I forget it's legal jargon. When people sell software what they really sell is a license. Even when people totally 100% completely give away software, they give an open-source license. Etc.
I like the other part of your idea too -- additional payments in the future for new features -- so much that I'd like to do it in the past and not just the future. I'm joking but here's what I mean.
There could be two different versions of Mojo with different features and different prices. The first version could be "Mojo Single" for people that run just one DAOC account. It doesn't have a Team tab or a "PCs with Mojo" tab. It doesn't have multiboxing scripts. It can't interact with copies of Mojo on other PCs.
The second version would be "Mojo Multi" for multiboxers. It has everything that's in Mojo Single plus a Team tab, PCs with Mojo tab, multiboxing scripts, and the ability for each copy of Mojo to talk to and control Mojos on other PCs.
There would also be a free trial version with all features except it's limited to running DAOC for about 30 minutes. Or maybe two trial versions, one for Single and one for Multi.
For prices, I'm thinking maybe $19.99 for Mojo S and $49.99 for Mojo M. Pay once, use it forever.