You might be much better off pleading via PM and as a word of advice try to avoid telling him how it will benefit you, because why would he care?
What can you do for the community and why do you deserve to be trusted enough for a signature campaign in the first place?

Have you done anything since your offense to prove yourself worthy of reprieve?

It appears to me like you've been around long enough to deserve a second chance since being tagged as a newbie loan-requester.