I was a newbie at the time and therefore the motivation was not to complete signature post quota. But simply to gain knowledge.
Being a newbie is no excuse, and I don't understand the link between you wanting to gain knowledge and failing to cite a source for the person's work which you posted. It also doesn't matter that you weren't in a sig campaign or what your motivation was for posting someone else's content. The fact is that you broke the rule about plagiarism, and unlike Mpamaegbu you're not claiming that you forgot to cite the source; you're not giving any reason for not doing so, just extraneous facts/feelings.
If you think that a ban should be ended, make your case in a new topic from a "good for the forum as a whole" perspective.
Why I think good for the forum as a whole ?
So far I have exposed 10 scams.
That's a mitigating factor, but if the mods are going to be consistent, being a Sr. Member with an account less than a year old whose main value to the forum has been exposing 10 scams isn't going to result in the ban being lifted. A member has to be very much valued by the community for that to happen, and personally I wasn't even familiar with who you were when I found out about your ban (along with Mpamaegbu's in the BestChange campaign thread). Maybe the moderators will see it differently, but that's how I see it.
By the way, you were pretty harsh with this member:
Op you clearly broke the terms and conditions. You KNEW your country was RESTRICTED from the start. I assume you were using VPN to access the site. And finally got caught. A better approach would have given you more audience and sympathy but blatantly calling a reputable company a scam because of your folly is...well...not a very good idea.
I would suggest that if the mods or the community apply the same standards to your own behavior, don't expect much support with your ban appeal. You never made the claim that you didn't know plagiarism wasn't allowed, therefore you knowingly broke the rule, just like the member in the above quote.