Sounders are averaging almost twice the league average of 15,238 this season, while Toronto have over 14,000 fans on their season-ticket WAITING LIST.
"Seattle is an A+ team," Luck said. "I don't think you can do it any better.
"I'm going up there to try to see with my own eyes what they are doing and hopefully come back with a few things that we should be able to do."
He also told the Houston Chronicle: "Seattle and Toronto are two teams we should emulate.
"It's not just selling tickets, it's also the atmosphere and developing a stronger corporate community."