That is something the TV news presenter says quite often to someone they have just interviewed. I think that phrase is a clue that they have not learned much from the interviewee; perhaps nothing at all which will help the viewers with an understanding of whatever subject was being discussed.
If the presenter had said “Thanks very much for your input, which was really interesting” then I think we can take it that the information gleaned was useful.
In the past I have to confess that a prospect might have said to me “Thank you for your time” after we had had a discussion about how I could help them. I now know it is a warning that I did not get my message across. Has anyone said it to you?
I always do my best to engage possible new clients in how their situation might be improved considerably if they went with me. If I hear that phrase, either I should ask before they go what they did not understand. Otherwise I think I should call back soon to clear up anything they did not understand.
“Thank you for your time” is the big brush-off, but we should not take it lying down. Follow up and clarify, and maybe not lose the business.