But if may also asked again what about their businesses that is ongoing here in the forum maybe there are some people who already negotiated on a deal with would their clients be affected as well, Like, after their business account is being ban and no means of communication won't they label the account owner as scammer?
The forum admins aren't going to think about such things and whether or not a person has outstanding business with certain forum members.
If you are running a business, you usually have multiple ways of contact. The forum and the PM system is only one method. There are email, Telegram, social media, maybe colleagues and friends of the banned individual. Also, banned users can still log in and read forum threads, and if you send them a PM, they could read it. They wouldn't be able to respond, but they can read your message. If you have unfinished business, you could PM that person your email, Telegram...whatever and ask them to contact you that way.
I also remember a situation in the recent past where a campaign manager got a temp ban for 1-2 weeks. He asked a trusted forum member to handle his business during the time he was gone and resumed normal activities once the temp ban expired.
If resharing my own content considered as a palagrism that would be a stupid thing.
If someone reports your post, the admin looking at the report might not know you are re-sharing your own content. Even if you do, you should post a link to where it originated from and avoid getting yourself in potential trouble. It's literally that simple, compared to having to explain that both accounts belong to you and wait for an unban.