http://www.kalzumeus.com/2010/09/02/new-trends-in-startup-in...
“You owe me $20, with interest. Don’t worry about paying me back right now. Instead, next time you raise money or sell the company, we’re going to pretend that I’m either investing with the other guy or selling with you."
So if indinero takes more money, the early investors could sell their hypothetical convertible notes to the new investors.