Mostly we're just trying to avoid getting too spammy. Maybe we'll just say what the hell and go for it.
If you wanna chat over email I wouldn't mind sharing some tips.
Abusing invites with more "viral channels" will only get the app into a lower invite threshold. FWIW I think a free TV is a pretty good incentive and will have people choosing the friends most likely to use the app. I do agree on promoting more the contest and the free tv thing, people tend to not read anything without flashy colors and big fonts.