As the developer, I just want to say, I don't think you're a bad person or anything if you take the refund, but I do really appreciate the folks who are kind in declining it.
For reference, 30 days ago Reddit was still being very promising with their claims for the API pricing to be equitable and based in reality, and 4 months before that Reddit told me they had no plans to change the API this year, so this level of refund really hit me out of nowhere.
It's a gut punch, and I loved building Apollo, but the kindness and support people have shown over the last few weeks really means a lot in making this easier to swallow, so I genuinely really do appreciate those folks considering declining the refund.