Positive. Only places I have steam connected is here, and backpack/marketplace .tf
What whovever it was did was somehow trade with a bot on quicksell.trade, then Trade with a bot using Tradeit.gg, and taking all my keys to a tradeit.gg bot account. It seems somehow tradeit.gg got into my account and robbed me.
I am considering pooling a legal fund to sue both tradeit.gg and quicksell.store.
the times are super close together, so it is very obvious this was a theft, and not just trading over time.