Why not offer a discount to people with valid licenses on other software like IPB or vB - you can create a landing page where they give you the license key, you run a check, and they get a discount for buying. Maybe you can't because of the lawsuit - but you could maybe not even say in the landing page or email to specify where they are coming from. You can just run the license check in a loop. Then you run a email campaign with all the users here who do not have a license in the https://xenforo.com/customers/ and you run a week campaign. Again, you're only emailing people who don't already have a license, I imagine that could get you 80 new sign-ups easily. That helps the ecosystem for add on developers, and your bottom line. So if you offered a $20 discount - thats $9600 for 80 people. Could be more signups.. Whats your conversion rate for people who buy add ons or resources? anyways. just a thought.