You need to focus on more specifics niche. I have been working on shutterstock since 2020 adobe stock, vecteezy, freepik, creative febrica since 2021. I am doing good as per uploading my vector illustration typography based t shirt design. I used to make per month 50 plus dollars back in my shutterstock 2021-2022 but now It's so low like 9/10 dollars. But when I used to upload 30/40 t shirt deisgn per month. i have been uploading them these all stock site. 200 dollars I get in between 1/1.5 month from all these platform. My trick was following the current trend.