i tried to contact them earlier, no response.
they are responding only when you approving ads for advertisers or in cases, when they have profit from you.
the best is use them as advertiser - claim daily from their faucet and use satoshis for advertising your site
I have 0.0018 btc from claiming from their faucet daily. I remember when they were giving out up to 50,000 satoshi a claim:P I will use that money to get some free traffic eventually. I sent them
another email. Hopefully, the third time is a charm.