Meh. Visually more interesting sports have tried and failed. Besides you guys are ignoring the big issue, no one wants to watch geriatric 'athletes.' Sailing is doing better on tv, partly because of the marketing genius of Redbull, mostly because the new cats and wing sails are fast and crash in a manner that makes NASCAR blush. Happy to see folks try, be fun to watch fans turn up after seeing glider racing on tv and get introduced to the 2-33. There are successes I couldn't find viewer numbers but understand the Redbull Xalps(900 km rag soaring race) is very popular, at least in Europe. Here is a sample https://www.redbullcontentpool.com/content/xalps
Gliding just needs young, likeable, tv friendly pilots...