They never pre-authorized our card for more than $1.
Although on our last trip when we got the joy of having SSR rebooked and a whole mess that went along on the side of those issues, we ended up with a credit on our account there. We spent just $5 and change over that. That charge was made after we had checked out and moved to VWL. We decided to set up charging at VWL, which we rarely do. (it was set up at SSR because you have to do so in order to get a credit when they mess something up)
Well I guess our CC didn't like that charge for 5-something, because by the time we were at dinner that same night, weird things had started to happen. I went to check dvcmember, to see if there was weirdness with our points from the SSR to SSR move, and on the front page after login, it told me that we owed money. Thinking it through, it was the same amount of money we had charged to VWL just that day, our first day at VWL.
We called the CC company during dinner (that was a joy), who said that the SSR charge had been flagged as fraud, so that caused our ROOM charges at VWL to be flagged on Disney's end. I still can't figure out how Disney found out about it, but they weren't charging the CC but also weren't really putting it on the room. Instead it was sort of like it was being put on our
DVC account. SO weird! I should have had DH take a picture of my phone with his phone just so I could share the weirdness.
We got it all worked out and stopped at the desk at VWL on our way in that evening, it was cleared up just hours from when the fraud alert was made, but it was so odd how Disney's hotel charge system knew there was something going on almost immediately.