Where did all the Poetry in Motion posters go?

Just an observation, folks....

The New York City subways have always, at least since the program started in the early 1990s, had Poetry in Motion posters adorning the subways and buses.

Anyone familiar with BillyBlog knows that I post the new ones here as soon as I see them. In late February, I posted new ones here.

But last week, as National Poetry Month commenced, I noticed that they seemed sparser than usual. New ads have gone up, apparently, squeezing out the poems.

Of course, as I type this on the train, I switch from an R to an N, which has at least one poster. So they aren't completely gone, but I am certain they have thinned in their numbers.

Has anyone out there noticed this?