Advertiser: Most TV shows depend on funding from advertisers and would be canceled without such funding.
Conclusion (thus)
If you feel like a TV show is worth preserving, then you should buy the stuff advertised during that show.
Intermediate Conclusion (so)
If most people fail to buy the stuff advertised during their favorite shows, the show will be canceled.
Evidence
If many people don't buy the stuff advertised during a show, then advertisers won't pay for those commercials anymore, which would lead to most shows being canceled.
Goal
We want a principle that will tell us to buy stuff advertised during the show. The trigger should have something to do with the idea that, .
So we want something like, .