i have some blogs but not tumblr or twitter. i started blogs with the idea of getting readers way back when. i realized getting readers is more about doing the leg work than it is about writing well or about interesting topics (commonly searched terms work better for generating traffic). i know a lot about this stuff and the majority of it is a waste of time. i have facebook but i don't update. even if you get follwers, in the bigger scheme of things, how many would it be? 100 a day? then also, return visitors don't click ads so unique is more payoff if you're looking for a business. bottom line, no one clicks ads so you better have a lot of visitors to get advertisers. if it's not aboutu money and you dont care if you have no readers, just go to tumbler and start writing. but yes, i do have blogs and i write on them. mine are old and idid the leg work so i generate some traffic and it's commonly searched topics.
i lied, i HAVE twitter but i haven't logged in since a year ago or more. 3 total posts on my account i think. twitter is a marketing tool, not for regular people imo. i get paid to post marketing stuff on twitter by people.