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My current situation is that I've already signed a contract with Company A, when Company B called. Company B interests me, although I've decided to stay with Company A.
However, they've called me in for an interview, and I said yes. My main reason for this is so that I could see the office for myself, and have additional data for my market worth.
So aside from that, is there any point to continuing with an interview when I'm sure that I won't join the company?
Additional info : They know I already have signed a contract as I've told them, but they said they still want to go for an interview.