Of the 38 people I follow 13 have the little subscribe icon and most of those folks are 'affluent' to say the least I'm not sure the average cyclist or runner has been giving them any $ I wasn't until this week.

And it's more than some computers I'm sure their Amazon Web Services hosting bill is in the 10's of thousands per month.

it's 5 years old but interesting

Sampling Strava | Mark Slavonia