Personally, I just buy from whoever is cheaper at the time and I default to Amazon if prices are equal because they have better shipping and easier returns. It doesn’t bother me at all who I buy from. I never meant this to be a moral dilemma.
Convenience usually wins out.
I’ve bought parts here and there from them. My new build I bought my motherboard there since they were the only ones that had z790s in stock for msrp. Everything else except the case came from Amazon. The only vendor on there was a dirt bag selling it for $40 over msrp. Best Buy saved the day there.