How do chrome extension owners get money from their extensions if they are publishing them for free??!

Question

Chrome extensions Freelance Work Money

Answer 1

Chrome extensions make money in 3 main ways; by charging a one-off or subscription fee for the extension, offering in-app payments or through affiliate marketing.

https://www.quora.com/How-do-Chrome-add-ons-make-money?ch=10&share=deb42e9f&srid=umdrI

Answer 2

Most use donation systems.

Answer 3

From where or from who?? Can you explain more??

Answer 4

PayPal button e.g.