It's cool you want to help out. I can understand the addition element.
However, offering a membership on single-player stats might not be ideal, partly because it's possible to cheat in single-player (all of the game takes place on your own computer, so there's nothing stopping someone from hacking the client and faking scores, see http://wiki.warlight.net/index.php/Cheating
Instead, you might want to consider hosting a free membership tournament, since it's not possible to cheat in multi-player. It's also more fun since you can watch the tournament games, see people's chat, etc.
If you decide you want to do this, I can set it up for you. Just go to http://warlight.net/Purchase
and select "Purchase as a gift that can be e-mailed to anyone", and enter an email address of firstname.lastname@example.org.
If you have any specific settings or terms you want set for the tournament, e-mail them to me at email@example.com. Otherwise I'll just use my best judgement.