[cgomez]

How will you make a business out of this or support its ongoing development?

Strava has a fairly robust free product and the nominal monthly cost for their premium service seems worth it to those more serious and want the extras. I guess I'm not seeing what you're addressing?

[ipaddr]

I worked for a company who did this many years ago.

Create new formula for performance. Hire respected thought leaders. Convert users to your way of measuring new performance.

Use the fact that the big guys don't use this measurement as your ad copy. If they add support for it that will generate a certain status for you which can make your brand.