We at Waterhole believe in zCash as an excellent altcoin of the future for its anonymity confirmations. Therefore, our escrow/trading application, Waterhole Messenger (both iOS and Android), have already implemented the use of zCash as we've been testing extensively for several months using the beta zCash while it was in development.
Not a very good choice of branding in my opinion.
Watering hole is a computer attack strategy, in which the victim is a particular group (organization, industry, or region). In this attack, the attacker guesses or observes which websites the group often uses and infects one or more of them with malware. Eventually, some member of the targeted group gets infected.