Tinker
Because there are already a million different companies offering those services and types of clubs, including all the Brand Name OEM's. That's neither unique nor interesting.
The business , market and money to be made is in the unique, private label product with good service. Millennials who represent or will represent the fastest sector of retail purchasing power do not care about and are not influenced buy traditional marketing and advertising, they use the internet to shop and want something special and unique.....they , more than any other demographic shop private label vs name brand, but the shift away from name brand is widespread. They don't care wat Rory or Tiger plays as much as the lemmings of days gone by. They are value conscious but want good product and service seeing value in private label over mass marketed questionable quality items.....much like we all did and knew with the good component companies like .Alpha, Wishon and so on.
Then there are the older boomers ( like most of us ) with tons of cash that want to spend it on something ....maybe not these particular irons ( if they are too players focussed ) but along similar lines.
It's not just golf, it's clothes, cars, audio gear, vacations, etc
These companies are jumping on the bandwagon and trend that has been in place several years now.
The market in Europe and Asia for these types of clubs is high, much greater than in NA, or so I am told buy people I know who sell this type of stuff