Don’t loose sight of what you have gained so far though. I would imagine if that is your rough earnings from the platform you must be towards the top %.
I think you should be more than happy that $976.55 came your way (although I understand you have a lot riding on it).
Medium will change, and I suspect as more writers turn to it, and the platform gives more time to external publishers, earnings may well get spread thinner. However, it seems you will still be at the right end of that scale though as you continue to put out your content !
Keep at it.