I'm also curious as to how you think a lot more users will be paid for. People aren't exactly conditioned to pay for relays or even know what relays are. It isn't clear to me what the experience would be like if a lot of people hopped on quickly. Especially if none of them understand Bitcoin values like paying for freedom tools, private keys, etc.
Overloading the free relays doesn't seem like a sustainable alternative to slow growth while the entire model is figured out.