Mwa ha ha ha ha I'm the mad sports programmer (sp) Hououin Riela! I was busy stopping the organization plans and didn't had time to write blog entries.
My archnemesis teja[some numbers] once told me that I was shit posting too much and I should start writing contests, so I searched in the web and found some problem setter guides:
codeforces: https://codeforces.com/blog/entry/49569 (It took me a while to find it, I think it should be more accessible in cf
It turns out that online judges pay for writing problems! I know that most people set contests just because its fun, but the payments are not negligible:
300$ 400$ for div1+div2, 150$ 200$ for div2)
750$ 1125$ with that amount no wonder why they have high quality problems!)
codechef (They pay per problem, for short contests 475$)
I don't know how much they pay in hackerearth, hackerrank, ...
Now I'm curious: are there professional problem setters that makes a living just by writing problems?