The golfers playing in the inaugural Saudi-funded LIV Golf event this week are doing it for "boatloads of cash", says Rory McIlroy.
Major champions Phil Mickelson and Dustin Johnson are reported to have been paid $200m and $150m respectively to play in the fledgling series.
McIlroy is defending his Canadian Open title this week on the PGA Tour.
"We all know why everyone's playing in London this week," he said of the LIV Golf event.
"It's boatloads of cash and it's money up front. I get it and for some guys that's really enticing."
The first tournament of the $250m eight-event LIV Golf Invitational Series is taking place at Centurion Club, near London, this week.
It is the most lucrative tournament in the world, featuring a $25m prize fund, with $4m to the winner and $120,000 for last place in the 48-man field.