Why do some job recruiters fake like they are interested in you?

Anonymous
I applied to a job through Indeed yesterday, and I got a call back today.

Basically they guy was looking at my resume and was asking me some questions, then asked when I was available to start. Then he finished by saying if I do not hear back from him this week it will be next week so I can get an interview, because he has resumes to go over.

Right after the phone call my Indeed status for the company I applied for was marked "Not selected by employer".

I mean why don't they tell you they aren't interested while on the phone?
Why do some job recruiters fake like they are interested in you?
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