Sorry guys, this rule probably will never be taken down. The 100 games limit was set up to deter bots and spammers from going in game and posting links to dangerous or suspicious sites. You'll also notice that there's a "you must play one game of Toribash before you're able to post on forums" (I believe it's in effect, may be wrong) and that's also to stop bots from posting malicious links and comments to Toribash. Of course, it doesn't always work, but it limits the amount of work other staff members have to do when a bot posts.
This is all coming from memory so a couple points may be wrong ^^