We also do a lot of digital advertising with Adwords. 

i know underwriters are digitized and a couple dollars over can throw a ratio off and kill a deal.  

We traded properties like poker chips but the loans remained in both of our names, regardless of one of us loosing ownership. 

I know that Tom Vu went to prison and now plays poker.

The entire thing will not be posted until it is all put together and edited, however, I will be able to post some photos.I will likely do so in a new thread or the 7-digit success stories thread found here:http://www.biggerpockets.com/forums/223/topics/73810-ready-for-7-digit-success-stories

Or, if you want to be more directly in real estate, investing in someone else' business will produce returns in low to mid double digits.

It's a digital signature program, that allows tracking and open notifications.You can easily add initials, signatures, and additional text onto the lease, and then send to your tenants.We use it for all of our out of state signatures, and also many in state as well, since it's much more convenient then meeting in person.

Citizens, Probates, etc.3) Signage - bandit signs, billboards, digital boards, event sponsorships, etc.Surprisingly, you can get some leads from Craigslist as well.If I had only $1K per month to spend on marketing, I do an AdWords account with a $33 per day budget.  

Somewhere in the single digits.

I am into Internet marketing as well as Real Estate but never mix the two as far as building real estate digital download internet programs.