My personal opinion would be that I wouldn't want my membership money going for it.
I would much rather have my dues going for maintenance of the actual golf course.
These putting courses are great at places like Bandon, Ballyneal, etc., where people are staying on site and where there isn't much to do other than play golf and talk about golf while having a drink.
But in the world of day-to-day reality where guys are rushing from the office to the first tee or running from the 18th green to Little Johnny's soccer game, I am not sure that the audience is captive enough to make it worth the investment.