Startup culture is strange, full of many litigious assholes who send out NDA’s to ask for your help. The problem is contracts are only as strong as the ability to enforce them. One ad agency founder wrote about his experience with a startup Called Spring Free EV founded by a VC named Sunil Paul.
The startup negotiated a contract over a few weeks before signing and breached it a few days later. It seems like they also spend a lot of time trying to get out of paying the termination fee they agreed to.
The contract negotiation and breach are well documented in the blog post.