I know we have lots of writers and readers here are some hoping you can help me out with the kind of weird situation. Maybe there is a convention for this...I belong to a small online writing community and have a friend on it, a "beta reader" who has put in a lot of time and effort into my stories. She has read over many many pages and given me really detailed feedback. I'm really grateful to her. Her comments and critiques have really helped to improve my writing and build my confidence (though I have no dreams of publishing anything soon

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Anyway, I would really like to give her a token of my appreciation. But I don't really know her, just through passing comments in emails about things, and through the community. I was thinking of an Amazon gift card, since it can be used for so much, and it could be sent through email.
Would this be too weird? But I'm not sure how this would come across. I don't want it to seem like I'm paying her or anything. Just more of a "Hey, you have done really nice things for me, and I would like to do something nice for you." Should I ask her first? What do you all think?