What do you mean by teams offering? Clubs? The critique sessions my daughter's team attended were sponsored by USFSA, not by any individual team. That was 4-5 years ago though, has it changed?
The Synchro team itself is offering the critique session to other teams - check out the link. Of course, it's sponsored by their Club because of the USFSA membership rules.
ETA: Maybe it's just this team, because there's a note on the link that reads:
U.S. Figure Skating has conferred official status to the Capitol Critique as a Sectional Monitoring Session in the South Atlantic region for IJS teams. As in past years, non-IJS teams will be critiqued by a panel of judges under the 6.0 system.
I've seen a great deal of cost-cutting in our synchro program, so perhaps this is a valid move by the USFSA to cut down on team travel and expenses? The high-level IJS teams really do need an official critique before the qualifying season. For many teams on the East Coast, Arlington's within reach.
Our synchro teams had an informal evaluation done in conjunction with our synchro open competition last year. We did a program run-through in front of judges, but I thought it was just an informal "what do you think?" not a formal evaluation.
It's a good idea, if the ice time and judges are available. Nice to open it up to other teams, too.