That really sucks!
But dude, why give up on the idea? you're selling the domain and moving on? Incubators aren't necessary.. keep plugging away and launch anyway.
I'm just in survival mode at the moment, living on my parent's couch at the moment with negative money in my bank account. I need to sell some things to try to get back on my feet again - that's why I'm seeing if I can sell these domains.
My suggestion (for what it's worth) is that you put this behind you and find a way to make it happen. If you choose not to, you probably weren't going to make a go of it anyway.
You got a raw deal, and that's clear to anyone. Now get back to work on your startup. This can be a roadblock or a speedbump; you choose.
Isn't this just the sort of test we've all faced at some point in our startup efforts?
I don't find it too useful to think this way. In the end, our time ain't worth jack. Solving customers' problems is where value comes from. If 4-6 man-months was put toward something that didn't solve anyone's problem, then it's worth $0.