In a sense, the charts are the charts, right?
Back when EFBs were “info purposes only” and not approved, we flew with cases of paper.
I’d buy them from my local FBO, pilot shop or online retailer. It mattered only that the retailer was reputable and i was buying the most current cycle available.
In a similar way, as long as the data is original, skyvector is just another “middle man”, right?