Until Zcash could attract serious investors there is nothing interesting going on to pump its price
I don't really think it is going to help
On the darkweb it has to compete with Monero, which is by far more popular coin. But popularity means wider acceptance and more usage. But more usage is a prerequisite for true anonymity and privacy. In other words, the higher the number of people using a privacy-oriented crypto, the more anonymous it becomes (all things considered). So Zcash is kinda neither here nor there, in a sense