Yes, because the creators of those English-language works often rely on ad revenue, and hosting their work here would effectively be stealing some of their income.
There's a very low chance of a non-Japanese/Korean/Chinese/et al speaker visiting the Japanese/Korean/Chinese/et al website where the work is hosted/sold in a language they don't understand. So in those cases the artist stands to gain more than they lose when their work is uploaded here.
Plus, it seems like Dynasty more often than not is willing to remove a particular work if the author doesn't want it to be here. Though I'm somewhat fuzzy on how that works; what I've heard is that the staff here defer to scanlators as to what to do when a work here is licensed or otherwise requested to be removed. I'm not personally a fan of that policy, but if that is in fact how Dynasty operates I can respect it.
last edited at Aug 11, 2016 10:01PM