Interested in provider and client perspective on this....and remember we're all doing this for various reasons and see different types of people...
How generous are you with your service provider? Does it depend on how / what they do for you? Do you always tip extra? Do you buy gifts for them?
I've always done this with all businesses that I am a regular customer of (barber, mechanic, delivery drivers) and did this with providers starting out. I would make sure to provide a full bar of refreshments at my outcall to make them feel at home, sometimes with treats/snacks and always had a gift bag of personalized shit (candles, perfume, jewelry, wine, clothes, shoes). I don't do that anymore and I've found the more I did, the less they provided and just took it for granted (got lazy). I've always had the OPPOSITE affect on the IRL businesses I frequent.