Umm...yeah. You can't skip commercials. If an app says there will be 5 of them, you can stop the stream and hope if when it restarts there is only one, but that is a **bleep** shoot (and almost always takes longer than watching the ad anyway). Really, did you honestly think you can skip commercials on "free" apps? My personal goal is to try and see how many times it takes to stop a video on Youtube before they decide I don't want to watch a commercial. One of these days I hope to hit 100 times before I get tired.
edit...really Roku? "c r a p" is "verboten"? What about context?