What are they actually counting? I can send 1 sat for free to my own Wallet of Satoshi account (I have channels with them) and back again.

I dare say I could shuffle myself 10,000 payments or more if I wanted. Unless they're watching for this I'm not sure they'd even notice.

One of the joys of using WoS for testing (for me anyway) is that they charge zero fees if you have a channel with them.