Serebii confirmed it doesn't do anything, at least to Pokejungle, but I haven't seen him post about it on his site yet.
I've tipped a lot after doing the Le Wow battles, and I believe it increases your chance to get a critical capture. I went through like 5 battles in Le Wow, then went to go capture some stuff in the safari and I had like a bunch of critical captures in a row. No o-powers or anything.
From what I could tell, it resets each day though. So if you tip like 1,000 every single time for one day, it'll reset the next day.
that's just me speculating though.