Can anyone explain to me why I keep getting 404 and 403 error pages from doupload and upload4earn? They are the only two sites that I have ever encountered this problem with. And before anyone says user error I have tried literally everything to make these sites work. Fresh installs, multiple VPNs from 30+ countries around the world, virtual machines, multiple different devices and even computers/devices manufactured from many different countries. It just does not work.
Doupload is hopeless. It is the pit of hell.
However, upload4earn is handled nicely by JDownloader, although you will still have to do the captcha.