Technically I am a YL rep but have NEVER made any money with it or sold to anyone for profit. I don't have time for that.
Anyway, they do advocate heavy use of oils. They do recommend some for internal use and some are external only. Personally I use herbs more than oils because herbs are not as concentrated, but oils have their uses. I have been to one of the distilleries in Utah and it was amazing. Very clean, very well run. I do believe they have one of the best products on the market. I have tried other therapeutic grade oils and have not been as impressed. I have not tried oils from Compass Concepts, but I know the owner and trust her. She used to sell YL and now sources her own oils. That is my 3 cents.