It's also possible TPTB didn't learn about the money until the camera crews reached the pit stop, and the video could be reviewed.
Does look like no penalty, unfortunately, but it is possible.
Can't the camera crews phone the pit stop?
In Season 11 Leg 2, teams were made to stand out in the hot sun as they reviewed the tapes to see if any teams were speeding after Kevin & Drew complained.
I don't think they review the tapes until after the entire race is over and James & Abba didn't seem to complain either.
When TPTB learn of a possible rule infraction depends on where it happens. If it happens in the vicinity of a task or cluebox, then there are local producers on hand who can relay the information -- hence, we've seen this season when a team was instruction to go back and take the correct form of transportation to the pit stop.
However, usually (from what I've seen over the years) there won't be a local or traveling producer at a travel agency used by the teams to book travel. Then, TPTB have to look at the video at the pit stop either because a team complained, or because the camera crew reports something to production once they also reach the pit stop. That is when a penalty might have to be assessed on the departure time for the next leg. Even then, we might not hear about it unless it affects the order of departure for the following leg. (Departures last night were pretty well spaced, so a penalty wouldn't have been obvious from the time stamps.)
There has to be a reason why the bit with the money was shown. Whether that reason involves the sisters, or the Rockers, or both we'll have to wait and see. But normally, with the editing on TAR, things get included for a reason, even when it is not immediately apparent.