As individuals, we (mostly) want companies building open source to thrive, particularly if they aren't behemoths of the industry. Ultimately though, efficiency matters more than sentiment. Companies rightly prefer a "good enough" product from a single source; even just avoiding a second enterprise agreement negotiation would make the AWS version worthwhile. Throwing unusual licenses into the mix, I guess new custom for Elastic Co is mostly going to be passed along by the other cloud providers feeding the anti-AWS prejudice within some customers.