Anthropic took away 150 credit! overnight!

https://preview.redd.it/vhrm8m5bd6tg1.png?width=2224&format=png&auto=webp&s=3675cb991a6ffc0704819f8313a8fc62d6224452

I claimed 150 yesterday and it was showing 187.50 and I woke up just now to see its showing 37.50.

what is happening ???