Keep the tank full.
The faucet mines, but a dominant miner wins nearly every block on public testnet, so the income rounds to zero. Donations are what keep drips going out.
In the tank4429.9 / 1000 TAZ
About 44,299 more drips at 0.1 TAZ each. Reload for the current figure.
Donate TAZ (shielded)utest17rnhex9h0grncus4ax40w2xkmvhz843mvp6c2sp2lcvnup85t9c7n806z099g0hkktx9rgy6cd4z68xthzp5tcz09gvlw4d4m6ynmm0qgj2svdsmw3s6f3d63uur5gyr57kdvnj47gxzsqcc83h6n56gxagen9len4e2dd5rkd36r0s04k56q0zy0gqk0evv06qt9llsqtjsuv2xkgd
Arrives shielded. Testnet only, so it costs you nothing and goes straight back out as drips.
Or point a miner at ustmUiVxo1bbZLP5z6KYfM4dh3PcX5wkd7on8
Transparent, because a coinbase cannot pay a shielded output. Mine to this address and any block that survives funds the faucet. Hashrate helps here in a way it cannot help us alone, since surviving a race is about share of the total.
Supporting the running costs rather than the tank? That takes real mainnet ZEC: fund the project.