Charlie Sheen's endorsement might bring more high dollar notoriety than would be the case with a younger popular figure. Charlie is older, sophisticated and will have greater appeal to the middle aged crowd with money to spend frivolously. This might be very good for USEI shareholders for obvious reasons, imo.
He's also know for his comedic style. That, too, could bring color to the rumored association.
Regardless of whom the celeb is, it's going to be another step in a process by which USEI becomes a recognized player in a theater where only The Real McCoy will be the last one standing.