I played last year and it's the only DFS sport that I made decent money in.
I was .4 pts which is two goalie saves from taking down a large GPP. The key is to fade the public at goalie, stack, and get lucky. I had Varmalov in Chicago, who was a low owned goalie for obvious reasons, but also was a fade against a large percentage of people that stacked chicago players. I had a blues stack (popular that night) and an Ottawa stack (very little owned) which killed it.
Quite a few DFS players take the same approach, which tips to opportunities to fade and set yourself up for the best chance to make a top cash. They like to use odds--sbrodds is a popular reference tool, where they will look for the highest totals, biggest favs, etc., and then build their lineups with those players. A lot of times this will work, but the ownership is so high that there is not a ton of roster variance. If you fade, you will lose quite a bit, but when the fade works, you have a great shot to be in the real money--not min cashing.