Simple answer: We aren't paid to speedscaning, nor are we obligated to.
Technical answer: This series isn't easy to translate, coupled with the fact that our TL (Agsilver) is already working for several other groups, it is IMPOSSIBLE to go any faster than the monthly pace we're trying to keep.
Currently we're about 1:1 with SevenSea's speed, which means every 3 months they'll have one chapter ahead (because of volume release).