Honeygain is currently looking to rent some of your internet connection and they will pay you (depending where you live) around $5 to $20 per month in BTC or PayPal!
Honeygain is an app for Windows, Android and Apple that uses some of your data to perform Google searches and price comparison searches using the traffic in your area for clients from other areas and in exchange for this valuable information they pay 1 credit ($0.01USD) per 10MBs, ($1USD per 10GB).
Their minimum payout is $20 and you can choose either PayPal or Bitcoin.
Get $5 (5,000 credits) using this referral link: Honeygain: Sign up and get $5 USD
Honeygain does not slow down your computer. It just runs in the background and is accessible via the system tray (notification area) in Windows.

Also, don't forget to log in each day to earn bonus points and refer your friends for 10% commision!