I was about to make the same topic, this user uses a new account now: https://bitcointalk.org/index.php?action=profile;u=2515724
He contacted me to give him a design to a whitepaper he claimed that he wrote, and I delivered the work in time but he didn't pay me and it's been 20 days, I can give more proofs of the deal, I have everything but I guess there is good proofs already in the post.
this is his new thread: https://bitcointalk.org/index.php?topic=5091256.0
and this is another accounts of his alts that is not in the original post:
open-mind: https://bitcointalk.org/index.php?action=profile;u=326172

he's contacting me from this telegram: @ICOpapers

It's clear that he keeps getting back with alt accounts for multiple scams, I hope someone can tag all his accounts and I'll do my best to spot his future alts.