There are plenty of hard-working people who wouldn't want to budget $8/month for something nonessential like a social media app. There's no need to disparage them.
I already have it. It's due to the account being of a fairly big online thing I built circa 2008. That no longer exists. A blue checkmark was only given to people with impersonation problems, if you proved that any media (newspaper, online blogs,etc) had published about you, making that noteworthy.
I have a blue checkmark, and twitter doesn't know who I am technically.