When you do sign up, please use my sign-up link – it helps my website a lot and you also get $5!
Earning money passively is always a good thing and while there are many sources of passive income most have a high barrier of entry to the point if you can buy into that income you likely do not need it anyway.
Honeygain is a passive earner that you can install on your computer or mobile (no virtual machines or data centres however which is something I will touch on later) with the idea that it uses your Internet connection to download and upload which in exchange they credit your account.