Grass is a DePIN project that enables users to sell their unused network resources for profit to companies vetted by Wynd Network.
To summarize, you sell your unused internet bandwidth to companies who want to run data scrapers. These companies pay Wynd Network for the data and Wynd shares the profits with you in the form of their token.
The profit expectation for something like this would be ~$100/mo.
Here is their website
Additional reading