If it's the page in my sig, then I'm the creator of that FB page. It's really hard to screen spammers sometimes and usually it's really easy to approve of them if I see anything remotely-related to off-roading. I may not see anything off-roading-related but maybe I see that you're a hunter or outdoor activist. If your from Africa, have a bunch of porn links in your profile and nothing remotely related to the above, then it's a good bet you're a spammer. Infidel joined and I initially blocked him because he had no FB profile.
Forums are the best source for easily-searchable information and the best way to post information such as tutorials and such. You can search for keywords in a FB group or page but it's not as easy and you often have to wade through lines of irrelevant material. FB is more about fellowship and instant gratification. On a forum like this, you may ask a question and it may take longer to get an answer whereas FB groups notifcation features and the fact that most everyone is addicted to FB, you'll get answers within seconds. There's also a lot of BS that comes with FB.
If you're just out there for information, join the group and turn off notifications. If you want to fellowship about the X2/X4 and give likes to someone's video or experience then that's what FB is for. Otherwise just be happy to be part of this forum.
FB is a streaming feed of info that's harder to filter but as previously stated, instantaneous vs a more-structured forum for information like this one.