Do other sitters want a way to know the Rover Card has been read?

I think Rover should have a way to show that the client read the Rover Card. Similar to how Facebook messaging shows that the person viewed your message. On occasion I post something in the card which required a response from the client, and I don't get one. I can't tell if they are not reading the card, or are just disinterested in providing the information. Twice I have asked one client if they have carpet cleaner. I have had to clean up doggie messes and haven't been able to find anything but all purpose cleaners that I'm not sure can be used on carpet. I never get an answer from her.