Using link-shorteners or other obfuscation techniques in order to post URLs which would otherwise be wordfiltered is not allowed.
Is obfuscating links allowed
in a scam accusation?
URL is broken by space, meaning that you will not be redirected from the forum to the mixer, and since the post in scam board and its purpose not for advertisement, then there is no reason to delete it.
This varies from ShortURL which still redirected the required page from the forum.