Calling sales tax "the death of e-commerce" is one of the click-baitiest thread titles I've seen in a while. It's a small percentage that doesn't even begin to bridge the gap between an online store vs. a brick and mortar store. Online stores have lower overhead due to smaller and less expensive physical locations - they can literally be anywhere and don't need expensive, high-visibility store fronts with lots of room for customers.
2023 Average Peasant Cube|and Discussion
Because I have more decks than fit in a signature
Useful Resources:
MTGSalvation tags
EDHREC
ManabaseCrafter