Backstory: While listening to another Art of Product Episode, they were discussing where to find terms of service when getting started. Rob Walling, a guest on the show and co-founder of drip, mentioned snapterms, a site that offered one time payments for these terms. The podcast hosts mentioned they thought snapterms was no longer maintained and couldn't find a replacement from a google search.
Validation: Snapterms existed for years and the hosts of the show were looking for a replacement. The key here is that it's one and done, a lot of companies are starting subscription services but people still want to pay once and move on.
Monetization: Snapterms was $400-$500, you could price similarly. This is a painful point in startups as they gain traction and $3k+ for a lawyer to draft these is not in everyone's budget.