Is this site provided by you?

[Tao-kun]

Bigjpg

Is does not provide the copyright information of waifu2x.

[nagadomi]

No. I only provide waifu2x.udp.jp .
waifu2x is an open source software, it is possible to create similar sites.
I also know http://waifu2x.me/ and http://waifu2x.booru.pics/.
In particular, waifu2x.me is displaing many ads on twitter and google, but it's not an official site, it's not related to me.