Let's say money as a proxy for "being non-trivial" or worth enough for someone to pay for. I don't know how else this can be signalled.
reply"Side" in the sense that my main income coming from somewhere else, aka my "normal" job
I interpreted it as "enough to live a comfortable life".
replyMoney is part of how you get there, but it is not a goal in itself. Many start businesses where money is the main goal, and where the amount that you are satisfied with inevitably shifts once you get richer
Considering that their cheapest pricing is $12 (per month, 1 month minimum) and they claim 550 million users, either they made tons of riches or the numbers are to be questioned. I leave it to you to estimate which is more likely.
replyI don't think that means paid users.
replyThey also have a paid API.