I agree the law has been on the books for ages, but as mentioned in the previously posted link, the newspaper article has stated:
Quote:
Although the practice of placing unstamped mail is common in many U.S. neighborhoods, the post office has ignored it until recently.
Personally, I think the USPS is not going to get "rich" by enforcing such laws and are really hurting themselves in the long run, as the public sympathy toward the USPS is being diminished because of it.