How to set up an Online Tutoring Business. A Programmer's Guide [pdf]
drive.google.com
drive.google.com
Thanks for taking the time to share your techniques!
I do not offer a signup button because I don't want to take every company, I prefer to talk with them first, understand what they are doing, and then decide if I take them as clients or not.
You mention answering questions on Stack Overflow, but I don't see anything on your site linking to your Stack Overflow profile?