The guides used to eat with families pre-COVID and Disney paid for their meals. Since COVID, guides don’t eat with families (at least not since last we were there a few months ago) and get their own Disney bought food when you eat. In terms of tips, it’s all over the board. The best advice we’ve seen is roughly the cost of one tour hour per day as a tip. Last time we were there, our guide did have venmo which made tipping exponentially easier because carrying around an envelope with a large stack of $20s (thanks, ATMS!) was a nightmare! And whoever gave you that gift is one heck of an amazing gift giver! Enjoy!