Yeah, I think tipping especially could use a "boost". As it stands, though I still do it, you don't get very much income from tips at all. Unless you're super low leveled, you probably won't notice or even care about the small increase it provides. But if they made it to where you could get collectibles that will unlock new exclusive items (other than the constant golden spatula displays that everyone probably has earned about 50+, and the Flower Display that you probably have 0-1 of). If there are new things to collect, that would certainly make tipping more potentially rewarding. However, they would certainly need to raise the drop rate a little from these rare items that you hardly ever find though.