[danenania]

It's possible that selling advertising could be different, but in most domains, it's pretty well-accepted in startup land that founders (including technical founders) will have the highest close rates at the company, regardless of whether they're smooth talkers or have past sales experience. That's because no one you can hire is going to know or care as much about your product as you, the founder, and it shows. Professional sales people are not hired because they're better at sales, but because you can only scale so far with founders doing all the selling.