Don't be serious about it but it looks like you purchased old bitmixer.io and changed the interface and few other things may be fees and relaunched the bitmixer.io service with a new name.
Update : After reading the page
http://www.bitmixcoin.io/faq.php I'm pretty sure about it either you copied content from the bitmixer or you are new owner of the service sold by previous owner to you or the service of bitmixer relaunched with a new name.
Why should I set custom fee?
If attacker knows service fee, he can analyse blockchain to find exact sum transferred and discover your destination account.
For example if you send 100 BTC with a fixed fee 0.5% + 0.0005 BTC, you should receive 99.4995 BTC. It is not so difficult to check blockchain after 24 hours and find all exact transactions. Even if you use several forward addresses it is quite easy. That is why we strongly recommend to set custom fee, combined with several forward addresses and time delay.
Your fee is 1% and 0.001 btc for every forwarded address but you are using old 0.5% and 0.0005 in example
https://web.archive.org/web/20170912094519/https://bitmixer.io/faqs.htmlhttps://web.archive.org/web/20170914190047/http://www.bitmixcoin.io/faq.php