Why be so concerned about where you can post?

Just post what you can where you are permitted.  As others have mentioned, if people favor your contributions you may eventually gain more privileges.

Whatever you have to say can be appreciated in the welcome area just as much as it might otherwise be in another part of the forum.  The audience you are attempting to reach most likely wanders through the welcome area at least sometimes, so keep an active presence and a good attitude.

Also, you might want to refrain from insulting the place and people you wish to have more access to.  That usually doesn't go over very well, online or in real life.  You won't get through the gate by insulting the gatekeeper.

And lastly, genuine and humble apologies can work true miracles in human relationships.

Be well.