The first time I found mangago it had in the description something like "the place for yaoi" I can't remember exactly what it was but it promoted the fact it was a website that focused on yaoi manga. Once it got more people though they changed the description it for some reason, but at least it's still a place where you see the most yaoi (▰˘◡˘▰).
That certainly right.
When mangago was made was it intended to attract this many yaoi fan girls like me. XD