> But you seem to be saying it is the seller's responsibility to understand the buyer's product and evaluate the integration during due diligence? I'm not OP,

> But you seem to be saying it is the seller's responsibility to understand the buyer's product and evaluate the integration during due diligence? I'm not OP, but I don't think that's what they meant: >> the product not being able to integrate with your product like they claimed It's lack of due diligence by the buyer after being deceived (intentionally or not). I imagine the seller saying "We support gRPC too, so we can interop easily" and then discovering that's not quite the case afterwards.