LM
90% of my income is from AVS.. its what i have chosen as my source of income in this business. Its the same principle though as anything in this.. try out a few of the ones recommended to you, and tune your designs until you find something that makes you sales.
I would start out by making 5-10 sites.. and making them different in design and finding out which ones sell for you and develop that further!
It honestly shouldn't be all that hard to sell FREE AVS passes... now with recurring ones etc.. thats a different story
Also u need to work out if u want to sell AVS passes or just do the Upsell as InsaneMidget mentioned.. that to me is too much work.. id rather sell AVS passes.. but thats just my
Nurgle