Also not to say this is how all recruiters work. I've spent enough time in the industry to know in 2 minutes or less if I'm talking to a decent recruiter.
Can you describe what it is you need to keep track of ?
I imagine giving out servicename@domain.com and if you get spam on that pseudonym you just block it in procmail or smtpd.conf or (whatever you do in gmail).
Right ?
- https://amazinghiring.com/amazinghiring-chrome-extension/
Recruiters feel that email/phone have better response rates, so many of them try to bypass linkedin by looking up your details in such a service. The third of these in particular found my details from the gravatar leak, as best as I can tell, so I wouldn't expect high ethics from these companies.