so ive been keeping up with this!! i think the automattic people do genuinely care about what makes tumblr unique and about blogging and an anti-facebook approach to social media, buuuuuUuUUUUuuut theyre still gonna try and make tumblr profitable and theres a lot of talk about premium subscription services, like on wordpress. but also, tumblr users are so aggressively anti-monetisation... i dont think it would catch on
good luck to them, i guess