> Also I’m not sure how are “promises” legally binding unless they are part of a contract?
You'd be surprised. Claims that are made as part of any marketing material or promotion can absolutely result in lawsuits if someone built their business on that claim and then Unity screwed them over. In that way at least, Unity is liable for the things that they say in a public capacity.
Most contracts I've seen have clauses that specifically say that you are agreeing that the contract is limited to the terms in the contract itself and waiving everything else so you are probably out of luck there.
You'd be surprised. Claims that are made as part of any marketing material or promotion can absolutely result in lawsuits if someone built their business on that claim and then Unity screwed them over. In that way at least, Unity is liable for the things that they say in a public capacity.