Greetings…
Ice-cream cake? Souvenirs? How come I don’t have a GM that is making me ice cream cake for completing campaigns?
As a side-bar. Personally, I found that adjusting the way that XP is rewarded in-game should only be done when combat is rare. Now, normally, they assume that XP is being rewarded to a party for dealing with one-to-four encounters/situations per session. Personally, I find that quite high, and in my game it pretty much averages out to one or even two encounters per session.
Where as I reward players for dealing with potential problems without conflict with the same amount of XP as I would if they had to fight with these NPCs; I also reward my players for roleplaying and problem-solving and other factors. So, in my table-top game my players generally never complained that they weren’t going up levels fast enough, even when they were just going through adventures and resolving conflicts through diplomacy, skill use and problem-solving.