IMHO, disc golf will never be a sport where the top professional players earn a substantial living, like tennis, bowling, soccer, cycling, etc. Many players on the Portland Timbers get paid ~50k. Most athletes that compete in the Olympics don't get paid at all. For anyone who thinks disc golf is a career...well, I hope they have a backup plan. Disc golf is best when played for fun.
I think the slow growth to the sport is a good thing, more courses, discs manufacturers, players and larger tournament purse. Fast growth to the sport would likely cause environmental issues, litter and crowded parks and frustrated players which would be detrimental to the image of disc golf.
I found an an interesting article on Bleacher_Report
I think that disc golf falls some where between ice golfing and cornhole.
The sports that are going to get more media coverage are fast paced sports where people get hurt, just look at WipeOut and sports RedBull sponsors, like Parkour.