Moar this. I've been in situations where the "idea" was driven by the "marketing guy," and it did not turn out well for me or my other technical partner.
When I saw the writing on the wall, I called a meeting and told them I didn't see the pay off of what we were doing and they were free to continue with my contributions. They sold a total of like $100 worth of apps after working on the project for another 10 months.
The last sentence sounds familiar to me: I built a fully-functional MVP over a few hundred hours. My partner, a family member, was going to sell it. I picked the niche because it's not very SEO-friendly and so he, being completely non-technical, had something to contribute.
He made ~6 sales in 1 month, never lifted a finger in the ~14 months since.
The app has run smoothly with virtually zero intervention on my part, so that was a win, at least. We have a couple of customers remaining.
I'd say. My friend who stayed didn't look for a new job after his employer went under (like many mobile gaming companies did when their games got rejected from the appstore), so he moved into his parents house to finish the projects. In all, he created 10 apps, using a lot of the technology I originally built. His "partner" sued him for 98% ownership of essentially nothing. It turned out sad for everyone involved.
When I saw the writing on the wall, I called a meeting and told them I didn't see the pay off of what we were doing and they were free to continue with my contributions. They sold a total of like $100 worth of apps after working on the project for another 10 months.