"Images Searche" sounds a bit weird in modern English.
Either the author is Geoffrey Chaucer or the site is not very professional.

However it looks just like a search engine.

Try adding any word following this url http://pic2.gophoto.us/key/ directly in the address bar, and it will perform a search on the fly -  so I guess they are not hosting your pictures, just searching the web for images like Google Images does.

I don't know them, but seeing how it works there's little to worry in my opinion, as far as our images are concerned. They are probably just trying to attract traffic to monetise with ads.