It doesn't seem to be a site issue, as other publishers are getting clicks at that time. It's possible your source of traffic during that time is poor quality so not as many valid clicks.

I haven't noticed while promoting other sites and networks that many signups are low during certain hours, so it could be many variables.

Your withdrawal has been approved. Cashouts are usually processed same day but can take up to 48 hours.

The old CoinHits website required Active bidders on your site in order to earn so that is probably why your earnings stopped. We have since completely redeveloped the ad network, and the New CoinHits site you can earn from all valid Clicks on your ads.

Let me know if you need any help or have any other questions!