Go there too. And Unreal's Marketplace.
Income from Unity's assets store is around 7-8 times the income from Itch.io.
Income from Unreal's Marketplace is around 4-5 times the income from Itch.io.
Of course they take a bigger cut but the userbase is huge and make it up. Just be sure to fill all the metadata wisely. Use hand picked tags, keys words and stuff.
I am sharing this because me and some of my friends are living from those two stores only. And they are from States, so the income value is smaller.
You do a good job Alex. So I want you to earn more money and make even more epic assets. Kudos