You are not use to loading Open Source but rather/mostly load 'commercial' scripts.?! Commercial deals w/licensing and 'BigBrother' issues far differntly the Open Source does. It is Why you see little 755 to 777 in commercial but all the time in OpenSource :)
Commercial doesn't release all the scripts. They usually hold 3 master scripts which are forced to load the site. If you have 'BigMoney' you can have them create 'source licensing' which basically they will write some 'Youmaster' scripts which see more they also monitor ;)