Knowing OAI's history, only big whales could survive being copied by the platform's owner—case in point: Amazon Basics. They're so big that most of the time, SMBs can't escape them and don't have a choice but to cave to Amazon's demands. Is your product successful? Great, I'll copy you, add the "Amazon basics" label, and start bombarding users with my "product".
Amazon basics is a private label just like Costco and the Kirkland Brand. Same thing with Walmart, Target, Trader Joes, etc. And if these SMBs don't have to deal with Amazon, they will have to deal with a dozen copycats from China for anything that becomes a hit.