Traffic itself doesn't dictate how popular or useful a forum actually is to the community.The vast amount of information and knowledge stored on the MFG forums for the past decade or so, not to mention the experience from forum members who have been around equally as long, makes the site 100x more important to the community than mugen archive can ever hope to achieve by simply having a vaster amount of creator content and in turn more traffic.
It all comes down to the fact that MFG has been around longer and has shown themselves to be the forefront of mugen related discussion and expertise.
Look at it this way, MFG has been around for 16 years longer than MugenArchive and they STILL get just as much, if not equally, the same amount of traffic.
You should want unity among the forums, not discord. Don't bring me problems, bring me solutions.