I don't think their move here is illegal. I think it's ill-advised, bad PR, will backfire and probably predatory on the group they are ostensibly trying to help. (Maybe even without them even understanding why.)

That all said, I was almost going to downvote your comment, but it made remember how much Uber actually has made a business model out of breaking the law in every country they are active in. Move fast and break things became move fast and break the law.