They are used to measure performance, not to enhance it, so there is no performance benefit. But if the athletes want to have that information, who are we to judge them? I just use Strava with GPS (no HR monitor, no powermeter or anything else) and I am pretty sure the stats keep me engaged and I would be doing less physical activities without them. If it works like this for someone using their powermeter, why not?
It's fun to watch numbers go up. No-one thinks that watching numbers go up makes them go up faster. (It probably makes them go up slower in the long run (lol), by encouraging short-term thinking and planning.)
