Speaking as somebody who met his wife on OKCupid, 10+ years ago, a lot of that stuff has now gone away.
You can write a long profile, but in order to message somebody you have to match tinder-style. The quizzes are gone, the interests are gone, and the journals are gone too.
(There is the ability to send an "intro" message, which shows up to people who haven't matched, but it is hard to discover as a recipient.)
Where I am there are way way way more people on Tinder as a result I think.