Donut complements anti-asset cards like Hacktivist Meeting, Whizzard: Master Gamer, and Scrubber to shut down Corp economy. Of course, then you can't really run Event economy, as it will shut that down, too. Some events will still be worth playing (e.g. Sure Gamble still becomes Easy Mark, and Account Siphon is still quite good), but you would want to rely more on a resource economy to avoid the penalty yourself. Or run Magnum Opus.
Of course, Donut takes 2 influence for each copy, and you never want to draw more than one, so Hostage becomes the perfect pair with Donut. Search him out when you need him, but grab other things when you don't. Even outside of Criminal, it still only costs you 2 influence for Hostage, the same as Donut. So the question isn't how many Donuts to run, it's how many Hostages to run. (True, it could get trashed, but if you're really worried about that, run Fall Guy.)
If you're running Hostage, then a whole host of other cards become attractive, like the aforementioned Scrubber, or Professional Contacts, Aesop's Pawnshop, The Supplier, Tri-maf Contact, Film Critic, The Helpful AI, Woman in the Red Dress, Inside Man, Kati Jones, and Underworld Contact. Then Off-Campus Apartment and Calling in Favors become potential additions as well.
So basically, if you're running a connection-based deck anyways, Donut Taganes fits. If you're running a economy disruption deck, Donut Taganes can fit. Try to pair him with asset hate as well, to shut down ALL of the Corp's economy.