I've been playing against my friend's cirminal deck quite a bit recently, and he pulled a lot of ice out of his deck and is relyign almost entirely on Crypsis. Criminals can get away with this more than the other factions for a few reasons:
1) your event cards are doing alot of the heavy lifting for you. Account Siphon only needs to get through to the hand once, and Crypsis works just fine for it. Once you've hit the corp with account siphon, you have even more money with which to fund Crypsis. Similarly, Inside job helps to reduce the cost of using crypsis since that's one less piece of ice you have to wory about.
2) You're getting a bunch of money back on your runs anyway between Gabe's passive and Desperado, so ice efficiency isn't as big a deal to a criminal as it is to other runners. The criminal economy can support Crypsis better than other factions can.
3) Criminals don't have to splash for Special order, so you're getting slot efficiency without having to spend influence.