They have the same birthdays. Neoseller created the account on Sunday, the day mhmmm ghosted. When I asked neoseller they then changed their birthday settings and mhmmm logged in. Coincidence?
Beware, this is likely the user mhmmmm which has taken orders from their sell.App Store and not fulfilled them. This user shares the same birthday and joined the day that user mhmmm ghosted multiple people.