We use our product internally for a few customers so no harm done that no one was interested but, to be honest, it stung a bit.
I think it probably would be easier to build for consumers or businesses. Our product was a developer tool so we knew our chances were slim. We actually got only two email addresses and when we tried to reply to one we never heard back. A couple days later we pulled the site and went back to the drawing board.
We now have a plan to go B2B with a product and we have a first client so we're moving forward. I thought it would be tough to get the team to change focus but its actually been energizing.
I was also afraid we'd have more than one idea with the team split as to what to do.