on top of you violating their Terms and Conditions about having multiple accounts not being allowed(doesn't matter if it is inactive).
I dont know, but here are official instructions, article "How to delete your BC.Game account"
https://bc-game-review.com/how-to-delete-account/And here in paragraph "5 reasons not to delete your account" is written:
"Difficulty in account recovery. Recovering a deleted account and all the details attached to it may be almost impossible. If you wish to come back to the site at a later time, you may have to start all over again without having any previous standing, funds, or VIP account. ... with a link to article (instructions) "How to sign up on BC.Game"
So with my common sense is possible to permanent selfexcluded from one account and later sign up new account :/
If you look at the Terms and Conditions when permanently deleting your account(permanent exclusion), it says that "you are not allowed account during this period", "you are not allowed to deposit into a BC.game account", "you are not allowed to wager during this period".
The part you mentioned on "5 reasons not to delete your account", I am not sure why they would include a link to their registration, but the FAQ explicitly say that only one account per user.