I'm sure some do it... but if they client is truly young, hot and attractive why would he keep on hiring?
I'm not saying it doesn't happen, sometimes out of discretion, novelty, etc. or simply because folks are tired of "Grindr fatigue" and don't want to waste time. A local escort told me about all the young in shape Asian and SE Asian men who hire him on his trips to San Francisco. Maybe some are closeted and want discretion.