AFAIK, Bitwhisk.io announced the were closing business on 5th - November 2018 probably due to funding(not sure why funding a server would be an issue since i always believed that crypto mixers make a ton of money out of mixing)
Closing after 5th November
If you want us to stay you may donate, we need around 0.05BTC to pay server's costs for the next 3 months
Their Profile was last online in November 2018. Which implies they really meant it(about closing business)

Now all of a sudden Bitwhisk.io is online again with domain information indicating that the domain was registered last July

No announcement has been made of the "return" from the previous profile in the forum
Is this a scam attempt by someone else who bought the domain or Is it a genuine comeback?