I know they're not required but how many guys actually tip or bring gifts for providers, and how many just give the asked-for donation?

The gift is something simple like a Starbucks gift card or their favorite candy. Some may not even consider that a gift. I don't tip or bring a gift as a matter of course.

END OF MESSAGE

And this has proven a fan favorite.  

I have given gifts to friends though.

when there is chemistry then it truly is GFE.

But I do generally tip the agency providers as long as the provider has met my expectations. I don't give gifts. No offense (or whatever), but gifts are for friends not for hookers.

will bring a bottle of wine if appropriate.

Of the gents I've seen have tipped or given gifts. About the same amount have offered to bring booze.

I guess if I saw a lady quite frequently, I would stop tipping and revert to an occasional gift (more personal)

I bring a bottle of wine because I want it.   If she chooses to join me, that's great, because I won't be drinking the whole bottle.

As I have posted before, I always tip, anything from $50-100.   I put it in the envelope ahead of time, though, so a lot of women don't even know I have tipped them until after I leave, and some of them never even notice.   I don't care.   I believe in tipping everyone in life.   The tip makes her pussy tighter and wetter.

......if the session is off the charts or the lady has gone way above and beyond then yes. Otherwise, repeat visit and recommendations are the tip. This is not a restaurant or a bar, this is the oldest profession.

Also to note, if a girl asks for a tip I seldom return.

I would have to say 80% give the required and that's understandable I never take offence but it does make you feel special and happy when someone appreciates your time and tips you or brings something you like to a meeting.