Only a few times. I've double dipped on Overwatch and MineCraft.

I've only doubl dipped once and it was on the new 3ds xl, which I regret getting (great device, but the software slowdown after it launched combined with Wii U and Switch games being far superior led to continued less use on my part).

I have the Nathan Drake Collection as well, but I also have the original 3 Uncharted games while only have beaten the first one.  The same goes for several other franchises I've bought into.

I haven't ever double dipped, except for something happening my old copy.

Idk if this counts:
Smash 3DS and Smash Wii U
Hyrule Warriors Wii U and Hyrule Warriors 3DS

Minecraft PC and Minecraft Wii U

But I really try not to. Like the MK8D.

Never have for myself and never will. I'm old school.

Very rarely. The only thing i can think of was the nathan drake collection and KH PS4 remixes

It's case by case, but yes.

WE know... smh. Fat assbear whore. 

Way too much for no more often than I get to play. I doubled with the PS3, PS4, and a ton on the WiiU. The WiiU is my retro machine with a 100+ VC games plus remasters and so on.