Okay, I get it! There's a movie about Cat in the Hat coming out!

The USPS isn’t totally removed from the Government.

Advertising in post offices? What a cinch!
They did the same thing when it came to The Grinch.
His hand held an ornament (he isn’t nervous),
"Happy Who-lidays from the U.S. Postal Service.)

Those dumb enough to blow $8 on this guano get what they deserve.