I switched from merrells, their VIBRAM soles came off after 3 months. yeah, they are more than happy to stand behind them...and send you a new pair of shoes that last...surprise! 3 months. understandably they don't replace the replacment shoes, but they did offer me an intenet coupon for 20% off any further plooking I'd be into.
if keen wants to sponsor disc golf the least we could do is recommend to them which of their shoes actually stand up.