Based on that experience and what I have read here in this thread from his fellow Russian-speaking members, I believe he would be an asset to the forum if reinstated. Please consider giving him a second chance
From discussions I've followed on the matter of ban appeals, the forum administrators are sympathetic towards accounts that are of value to the community, but this would only count if the plagiarism was an 'innocent mistake', and not done with any; to complete a campaign task, to get merits for another's content or to increase forum activity (this would not be an issue now as activities are useless without merit(s)).