Look at how often job offers -- and the type -- are posted. 1 in 2024 so far and 2 in 2023. With a lot of offers in 2022 repeat spammed.
Registering an account here at CPlusPlus has been disabled for quite some time, so any new recruiter is out of luck.
The overall traffic is definitely on the downswing as well. CPP outside of the fora hasn't been updated in years and is pretty much a ghost town being kept alive by an mostly absentee landlord/owner.