They could for sure - others already did that and bought well running extensions. https://www.reddit.com/r/IAmA/comments/1vjj51/i_am_one_of_the_developers_of_a

They could for sure - others already did that and bought well running extensions. https://www.reddit.com/r/IAmA/comments/1vjj51/i_am_one_of_the_developers_of_a_popular_chrome/ https://www.reddit.com/r/IAmA/comments/1vjj51/i_am_one_of_th... At least, not all extension developers gave in to $$$.