The more users it gets, the more it will become like reddit. That's how reddit became like it is today, too. Who has so many potential consumers under his roof, will get a lot of offerings from corporates, too. If you allow many different opinions on your site, you also can become blackmailable. So you will eventually start to direct all opinions in a politically correct as possible direction, still claiming it would be for "discussion pyramid" or whatever bs you call your shield for justifying your ban-actions. It works.