Hmmm.
I think i've seen these kinds of sites before, but faster & cleaner. They simply use referral links/iframes of already existing exchanges such as Changelly, and offer really nothing (except the display of "the best rates", which could be subjective at best.)
I also need to register on swapcoins.com before i can proceed to changelly/changenow to swap my BTC to eth.
I'm not sure what the thought-process was here, but once i would find out that changelly is the cheapest, i'd probably immediately google them myself, instead of registering on your site..(for what exactly?)
Obviously, that is you're prerogative to go directly to the source. With that said by the time you check out all the exchanges individually you probably are not getting the best rate. With our service it takes mere minutes to create an account and get the best exchange rate possible. No time wasted, no opportunities lost.
Why don't you give us a try and report back to the thread?