1- Visit https://www.shodan.io and search for routers with default password.

2- Login into the router.

3- Change the password to your own.

4- Change SSID to a hotline you control or your email.
Example: Get your internet fix! supportemail@proton.me

5- Blacklist Google, Bing and Facebook.
Why? Google and Bing so the user can't find how to fix the SSID and the router.
Facebook because it is the most used site and the user may want to visit and is blocked.

6- Hack a few routers and wait for users to contact you.

7- To fix the router charge for the task.