This was (and I assume nothing has changed) an endemic problem in the UK, especially for contractors.
One of the most accurate descriptions I’ve ever read about it is “Don’t feed the beast - the great tech recruiter infestation” [1 - though an archive since the original has been taken down].
I'm a freelancing software consultant from Germany that gets increasingly spammed from UK recruiters and always wondered what the case is here. Your linked article pretty much nails it though. That being said things are only slightly different here in Germany, albeit not too much.
One of the most accurate descriptions I’ve ever read about it is “Don’t feed the beast - the great tech recruiter infestation” [1 - though an archive since the original has been taken down].
[1]: https://gist.github.com/CumpsD/696599d1bd4cd472a056586967293...