Remember: human beings can hold contradictory beliefs simultaneously. Human beings can also hide their motivations.
Have you ever given a potential partner/friend/sex partner a no-strings attached gift?
Boy, that's one thing I tried to do - I put in a lot of effort knowing I'd fail.
The first gift I gave plainsong was on my birthday, less than 24 hours after the first time she refused to have sex with me - fear of pregnancy and fear of being abandoned compounded by forgotten CSA, not to mention that she was about to go to a great grad school and she didn't want to fuck that up with a questionable (because it was new) relationship.
I wanted the gift to mean I was committed, that I respected her right to make a decision about her own body, etc., etc., etc.
But i was conscious of other thoughts, and I probably had thoughts that haven't yet come into my consciousness, like:
I wanted the gift to increasing her liking for me. That wasn't a requirement, but I sort of expected it.
I was willing to accept 'no' to sex for some time, but I was in love with her, and I loved her, but if we weren't getting into bed sometime in the more or less near future, I wasn't going to stick around.
Later I gave her a string of pearls. Spent over 1/8 of my assets on it. We were almost engaged. If, in the end, we decided not to go through with the engagement, I wanted her to keep the pearls.
Soooo...no immediate strings attached ... but strings were attached.
I never could figure out how to give an NSA gift.
And yet the desire to give an NSA gift was strong. I wanted our relationship to be non-transactional, but it couldn't be.
But our relationship has been as non-transactional as we can make it. It has been, in a way both T and NT.
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Perhaps the NT element is taking the risk of giving/tieing oneself to another ... but even that is probably done in part to get something from the other.