The coin-hive was put as testing limiter for bots.
It's not a question of money, these are the Monero we raised with it 0.00430216 in about 12 hours.

There are some news coming up with the WASM PoW and we could use it as limiter, but I also guess BOTS will have enough money for PoW. So probably PoW as limiter won't be a good option as it has been implemented now.