If you had your own inventory and order process, that argument would be easier to make. But if you're just filling order forms, exchanging bitcoin and intermediating payments for any online store, I believe the authorities at least in Finland would like to consider you a payment processor.
Discussion
Buy a box of marbles and sell them directly, there is your inventory 😅 I think it is crazy if you have to pre-buy and store yourself bunch of things before you can sell them online. If you can reliably use an AI agent to order stuff from other sellers, which someone else orders from you, you have already saved lots of costs in comparison to other similar online shops which use payed workers for that. So it should be a viable advantage for an online shop, and you shouod be able to hide your real agenda 🤞