LAERTES, I'll take your questions as you asked them. Everything below is IF SHE THINKS SHE IS DATING.
Do we care about them or them about us? Yes, at least a little. We take an interest in the stuff they want to talk about and how to improve their life situations. They want to fulfill us in some way through affirmation or sex they enjoy offering. Yes, the caring would end abruptly once the sugar stops, as you say, but they will separate that from the present reality.
Are we trying to impress them? For me, no. With the emphasis on "trying." Yes, they need to be impressed to be dating, but how hard will we try to impress them? For me, not very hard at all. She either likes me and what I'm offering, or she doesn't. I don't have the energy to "try" to impress her. The "impress" energy needs to come from her, not from me, or it's too much work. She gets to enjoy some idea that I impress her effortlessly, which is true if I impress her.
You mentioned an enduring relationship. Therein lies the rub. Dating relationships don't stay the same. They are either on the upswing or downswing. Good dating relationships have a quality of progression. And that is precisely why some of my LT arrangements ended. She wanted to keep progressing further than I wanted. (Requests were marriage, buying a house for her/us, ever more meaningful gifts, etc.) I refused, or she detected my cold feet, and then the dating ended shortly thereafter.
I would add another thing that makes sugaring "dating" for her. She gets to tell her friends about this "great guy" she's seeing. My SBs have been happy, for the most part, to be wined and dined and sometimes museumed. An occasional trip. They pay nothing of course and have great photos for their Instagram of places and situations they could not afford. One girl in the PI used my ipad to take probably forty pics of her in the rooftop pool of my hotel while I sat safely poolside. She was stunning and she really had a knack for getting good pics of herself. Those pics increased her status among her peers.
And let's not forget that the most anti-dating thing imaginable is a transaction. If allowance and playtime are properly separated from each other in every possible dimension, she can easily entertain the dating fantasy after the initial negotiation is complete. The instant she allows herself to realize a transaction, it's no longer dating in her mind. Lots of guys here have pointed out that the sex would disappear the minute the allowance went to zero. The SBs have to intentionally forget that if they think they're dating us. (Haha. And let's imagine a girl who believes any of us would continue allowance if she closed her legs to us.)
An amazing example: A Chinese girl, older than I usually like, told me flat-out she was not interested in being anybody's "good-time girl." I assured her I wanted to see her frequently. We really did date. I took her everywhere she wanted to go. I showed her off. I treated her gentlemanly. Waiters treated her like my girl. She never failed to spend the night. I never let her catch me slipping her allowance into her purse. She pretty much was my "good time girl" until, more than a year later, I had to refuse her marriage proposal. I am sure she thought of us as dating and courting.
Your question is a good one. It's not pedantic. There's more to say, but that's my first take.
Rockford