Thanks for the input, everyone! One of the main reasons I was asking all of you about this is because NO, it DEFINITELY is not worth risking a friendship over stamping supplies!
I'd semi, sort of considered the joining SU! thing, but I'm not sure how much I would pursue it as a business - I'm way too fickle and like too many things from too many companies to be loyal to any particular one so I'd probably not really do well. That being said, I may join and see how it goes. I just talked to my friend to see if it would affect her ability to stay active as a demo if I totally suck as a downline, and it sounds like she just wouldn't get any override commissions from my paltry sales, but would still retain her discount and all of that, so I may consider joining tonight or tomorrow to take advantage of the deals going on right now. She sounds kind of excited about it