It's also a diversion from releasing real new content.
"Hmmm ... what to do to keep the plebs busy? I got it ... overprized new shit that buffs some stuff ... and don't forget those chars we haven't got in green/blue/red/purple/yellow yet ... make an event to get them that drains a lot of ironite and tell the idiots double chance! YES double - 0.5% or 1% doesn't matter - the suckers still won't get anything out of it"