Post Office
In at least two of the three episodes this season Marc has mentioned going to the Post Office or Kyle just got back from the Post Office, for Marc or something.
Stamps.com is probably the ad that has been on the podcast the most. The point always seems to be "never go to the post office again." I can understand them not wanting to pay to be mentioned on the TV show, but it seems Marc is going out of his way to emphasize he is using the PO this season.