There’re some nuances you should take into account if you want to use the websites. Let’s say, if you want to use Twitter, your post doesn’t have to be in English, but it’s obligatory for the website. Each article should be unique, copying articles will lead to disqualification. There’re fewer topics you can write about, you’ll have to discuss artificial intelligence, cybersecurity, game development and programming. The audience should be interested in blockchain and cryptocurrency. Can’t tell anything about the rates, I don’t use a website.