I so feel you! VERY impressed that you are holding off and using up stuff first!
I've only tried one of her products so far: the protein-free marshmallow ____ deep conditioner. It's the best thing I've ever, ever, evah, evah-evah put on my hair. That is saying A LOT. So after trying it, I went back to her site and compared its ingredients with other products of hers and read reviews. I am MORE than happy to support her. She is so on-point with everything.
Another reason I went ahead and invested in her products: I am working REALLY hard to simplify everything in my hair care: the regimen, the number of brands, etc. What I've been doing/using is only giving me so-so moisturization and results. I can't imagine her products doing worse, and I can definitely imagine them doing better. So I went ahead and just moved to a NG-centric product line-up, based on how her DC did my hair.
If it all only performs so-so, then oh, well! No loss, really: Same as what I've been getting from my technique+products, and I supported a wonderful sister. If it does my hair great, then YES! And then somehow . . . SOMEHOW . . . I'm going to find a way to get rid of the rest of the products in my medium-sized stash. I wouldn't have been able to honestly start my no-buy without investing in those NG products. Once I experienced the DC, it was kind of over.