You must understand that the companies you named are a pyramid, they pay people as long as the company has new investments, when there is no investment then the project closes, but iсo has a promising direction that can really help many people and in some cases change the world one of these companies is @swachhcoin. The project will pay people for their trash. At the moment there is a 12.5% bonus, you can buy coins by the end of October. I advise you to see the project.