Advantage to those who can "pay extra" is precisely my point. Disparity that creates a "privileged class" game environment at WGT. Really, there's nothing complicated about a downloadable swing meter module. It's a simple "progress bar" program script and wouldn't take but a minute and an IQ = shoe size to install, so that your swing meter would run off of your own CPU.
Results = no balks, no skips, no leaps because there's no interference or competition going on for CPU horsepower, and it would not at all be dependent on Internet speed to work the same for everyone.
You'd hit your ball with the same (in appearance and function) swing meter, and upon the click to stop the progress bar it would transmits that data to WGT. Might be a millisecond response delay between click and the animated character's swing, but we see that a lot, especially on weekends, anyway.
Point being, the data your onboard swing meter would send to WGT would be exactly what you clicked, just as though you had clicked it on computer connected to WGT by a T1 or other fiber optic line the size of your leg and never had an issue with bandwidth capacity or consistency.
Technologically, this is entirely doable. Basic stuff. So, why won't WGT do it? I've been a member for several years now and recall this downloadable swing meter module discussion being posed back then, so this isn't some novel idea that WGT has simply never thought or heard about before.
But never an answer as to why not, leaving only one conclusion -- profit motive. I can tell you that I've hesitated inviting some friends to come check out WGT for that very "uneven playing field" reason. To see no reason why an onboard swing meter hasn't been offered is equally discouraging. Does WGT think that the extra virtual golf balls they sell due to twitchy swing meters is more important, more lucrative, than bringing new members aboard?