I don't think your chances of getting your account or accounts unbanned and reinstated are good. Many people have been banned in the past for plagiarism-related offences and very few are forgiven. Even if it's true that you worked as a bounty manager and ANN poster for that ICO, you still copied their texts and posted them in your name, which makes it look like you wrote them. All that you had to do to not get in trouble was to post a link to the source or make it clear you aren't the owner of those posts.

Even if the admins were to look past those plagiarism cases, there is still the multiple ban evasions. You borrowed and used alt accounts to request loans on the forum, which wasn't allowed according to forum rules. You participated in other activities outside of a ban evasion thread, which is also not allowed.

Admins sometimes forgive users who have greatly contributed to Bitcointalk but made a mistake. If you dodge and don't respect the rules to continue earning on the forum, they generally don't look that lightly on that sort of thing.