You can tip all day, but it should always be free to like. Otherwise, the responses will be like: "trust me bro, I like it, but I'm now broke." 😆
Pay-to-reply would be more effective in the sense you proposed.
You can like anything in real life for free, but also in real life a lawyer or a hooker will charge you by the hour. It's all about the work and utility.
Pay-to-like removes a feedback loop that we miss in real social interactions. You could call that feedback loop an "algorithm". Imagine seeing a comedian, but now you have to pay to laugh. 😆
You could also have to be paid to like. ðŸ¤