If each person who signs contributes the small sum of one billion dollars then this will go somewhere. Only way to get Twitter back is to buy it from Musk for more than he paid.
Change.org does not allow you to donate directly to the people running the petition, but to the organization running the site. This may be confusing, but it’s true.
https://www.quora.com/What-does-change-org-do-with-its-donations-Do-they-go-to-the-activists-or-somewhere-else
If you want to get Twitter back, you should ask Jack Dorsey and/or someone associated with the company who thinks pre-Musk Twitter is better with a petition to start some kind of crowdfunding to buy it.