Honestly, I don't much care if I get greeted or whatever. FA's got better things to do than to check the app every row to see if they will upset someones feeling by not greeting them as a 1K, GS etc. I realize your bosses and some passengers may not agree but cest la vie, I won't say anything.
I have never been asked for my card though, typically I see them look at the app, hand me what I asked for and say "Thanks for being a 1K"