I am a Sublime Text addict, but hate how slow development is and how resistant they are to adding more dev-focused features. I would happily sign a CLA if it meant I could modify the code myself, even if I end up paying to use my own code.
Giving the owner permission to sell my contribution (which is likely very minor compared to the rest of the project) gives me added peace of mind since I know that the project is (or can be) sustainable.
A rug pull is always bad, but it's not fair to assume that that's what will happen (unless you know something we don't).
And besides, even if it does happen, that's what forks are for. This project is licensed with GPL and AGPL.