The 50 post rule was brought in to help combat the spamers and scammers, namely the bogus bitcoin sellers who fill up every board on the forums with their annoying posts. This way they get contained to one sub forum giving the mods a chance to delete their posts before they spill into the rest of the forums. Look I'm hearing you re the newbie section, it is festering mess of spam and I would seriously love to go in there and clean it up but for the time being those who run this site are turning a blind eye to things and that's just how things are I'm afraid.