Are there that many daytimers left?

In the USA, AM daytime-only stations are "Class D". This used to be a
strictly daytime-only classification, but quite a few years ago many
of these stations were reallocated with "flea power" nighttime
signals, as low as 1 WATT. Today, "Class D" AM stations are limited
to a maximum of 50,000 watts daytime, but only a maximum of 250 watts
at night.

I don't know what the lowest DAYTIME power level for North American AM
stations is; despite it traditionally being 250 watts, there are a
number of stations using less than that during the daytime; I've heard
of one 170-watt daytimer, and right in my own backyard, 1170 WWTR in
Bridgewater, NJ is licensed for 243 watts, non-directional,
daytime-only. In that case, it's a long story -- the station
originated as WBRW, a 500-watt directional daytimer which went dark in
1990. Their license was subsequently bought out with the intent of
getting it back on the air under new ownership. Unfortunately, the
original WBRW transmitter site was vandalized beyond repair and the
towers were taken down, so in order to help simplify the construction
of a new site, they were granted a Construction Permit to change to a
one-tower non-directional signal, which necessitated the power
reduction to 243 watts. So, in effect, New Jersey got a "new" AM
daytimer in 1997 -- even though the FCC stopped accepting applications
for new daytimers a decade earlier!