I wouldn't be so sure of that. For AWS it is risky to not support popular platforms, because it gives their customers a reason to move elsewhere. AWS is not the

I wouldn't be so sure of that. For AWS it is risky to not support popular platforms, because it gives their customers a reason to move elsewhere. AWS is not the only cloud provider around (and certainly not the cheapest). There is a reason they developed an alternative to MongoDB instead of just saying "sorry, we don't support MongoDB because of license". They couldn't buy a license from them because that would set a bad example (they are not really fond of these alternative licenses) and they probably didn't want to maintain MongoDB codebase (before relicensing), so this was the only solution left.