The most trending forum on the Internet is beer money forum. The site has grown its reputation so much since the end of last year. Due to its grown reputation, the site has started being so strict and only requires people to post important content that can benefit other members as well otherwise you'll get banned from the site.
Also forum coin has been around for such a long time and its known to be a legit forum for years. It doesn't earn one much but its one of the most comfortable forums that I know.
We also have postloop and the forum wheel although recently have seen several discouraging reviews about the sites and I don't know whether its still worth joining them. We finally have the recently forum, earn that buck. So far the site is well and paying well for the posts. But then, two countries, India and Malaysia have been banned. Its just a worth joining forum.