/ic/ - Artwork/Critique

I said before how Upwork was not woth it for me, not much changed- I spend maybe 5 minutes browsing and applying to relevant job offers (I already got a full time freelance job anyways), I just got a reply saying that they hired another concept artist, but they really like my work and will keep me in their contact list so they can get in touch with me if they need me in the future. Is it a standard Upwork reply company use over there (it sounded really professional) when they review offers, or do they really mean they will actually add me to their concept artists list? I am not sure if I should reply to that PM, or if that's just a way "thanks, but no thanks" looks like on Upwork?