Blocknet has 100% real atomic swaps on their Block DX exchange
right, but you have to buy their token to use it.
if there's more than 1 transaction, it's
not an atomic swap. Blocknet could sell you a bunch of their tokens, then give you no access to people to swap with.
You pay a fee to the service node who makes sure no duplicate utxo's exist with regards to your counterparty's collateral so that the decentralized orderbook isn't bloated and taken advantage of - the trade itself is strictly a P2P atomic swap and the fee transaction has absolutely nothing to do with the entire atomic swap process. The fee is only charged to the order Taker too, so you don't need to have any BLOCK if you make orders, only if you take orders.
Your personal definition of an atomic swap is clearly wrong.
The entire exchange is completely decentralized so Blocknet itself can't do anything to block access to people to swap with.