The Muck
Folded hands.
Every player mucks more hands than they show down. These are the businesses that got folded: what was built, what it cost, why it died. Some of these ideas could still work for the right player. Read the post-mortems before you make the same bet.
Folded something? Post it as a build, set the status to The Muck, and write the post-mortem as your first log entry: the idea, what you built, what it cost in time and money, what you tried, and why you let it go.