By the time licensing becomes relevant, your business is built around the platform and this gives Gumroad an unreasonable advantage in any negotiations. Imagine

By the time licensing becomes relevant, your business is built around the platform and this gives Gumroad an unreasonable advantage in any negotiations. Imagine what they could say: - You're now a competitor. Stop using our software (you can still sell on gumroad.com, hint hint) - Give us 20% for 1 year (next year, who knows...) - We won't give you a license, but we'll buy you out for next to nothing.