One of my good friends has posted one of those facebook birthday fundraisers to her page. I have been friends with her for many years and have always bought her a small present for her birthday. Is the done thing to instead of getting her a present to just donate instead? I don't want to offend her by donating then also not getting her a present, and it doesn't say anywhere about 'I want donations instead of presents' - just that it is a birthday fundraiser. I didn't want to just ask her if I could avoid it as I wouldn't want her to feel pressured in to saying she wants the donation instead. And I cannot afford to do both.
I know I am probably really overthinking this, I am just not very up to date on facebook etiquette.