I created Postcard Panda about a year ago and have thus far been unsuccessful at promoting the app. Postcard Panda is an iPhone app that allows you to send a snail mail postcard to anyone in the USA.

URL: https://itunes.apple.com/us/app/postcard-panda/id818198323?mt=8

Availability: USA app store only, can send postcards to USA addresses only. Only available for iPhones, not iPad

Pricing: $1.99 to send a postcard. After fees I make $0.93 per postcard sent.

Time invested: About 2 weeks development time

Money invested: ~$700 for logos, splash pages, and unsuccessful facebook ads

My offer to anyone willing:

I'll give you 50% of the profit per postcard sold while you are actively marketing Postcard Panda (that's $0.465 per postcard sold). In addition, I'm willing to match marketing dollars put in up to $15 a day. Any takers? Is there a market of people who are willing to drive sales to an already existing product for a stake in the profits? Drop me an email if you are interested (it's in my profile)!