Ask HN: Break a Signed MOU

Hi all,

A friend of mine joined an incubator program, signed their MOU basically restricted them to leave if the incubator decide to select their team.

Their team was selected to get investment, no further documentations was signed.

But they realized the deal wasn't that good and wanted to leave. People in the incubator didn't agree, said they either quit without touching the project in 6 months, otherwise would be sued

What's your advise in this case?

Thank you!