That event was last month, but there are often similar events held. I'll get this month's list together and post it.
The format is not much fun for players like us though. You get a set amount of time to play, usually an hour. You can use up that hour of time whenever and however you like during the month. Your score is your total chip count. You don't have to play any set number of hands. In fact, if your starting chip total was enough, you wouldn't have to play at all.
The fact that it lasts a whole month is meaningless. The interesting part happens in the last two hours or so. Keeping some of your time left to maneuver late is helpful. However, these events are usually won with very large totals. You're more likely to run out of chips, time or both before you catch the leader.
So, there's no effective strategy other than bet big and win lots of hands. Still, because some players won't bet aggressively, and other players will use an inept playing strategy, there's an advantage for a solid basic strategy player who knows to bet a lot.
I've won several of this style tournament online, and Walt H has won several as well.