I'm not sure on what technical basis bcc miners and other bcc nodes reject btc blocks. What I know is that bcc is not existing yet since there is not a single bcc block yet. May take a while due to bcc miners mining with btc difficulty.
I have payed for t-shirt delivery three times. Two with credit card, and one with crypto, because payments from credit card were declined. But now I see, that $7.5+$7.5 for delivery is gone from my card. Dissapointing.