^Taking over only applies to cases of scanlating the new chapters after another group who did the previous chapters quitted, and sniping applies to cases of doing so while that other group has not quitted. RosmontisWorshipper do their own thing and post on MDex from ch01, Hot Salt Frying do their own thing and post on Dynasty from ch01. Neither has the actual authorisation by IP holders, so neither owes each other a permission to translate the series independently, as the work of one does not impede the other's. This is just a case of redundancy. In an ideal world all scanlation groups would communicate, cooperate and devide the works to translate as many series as possible simultaneously and avoid redundancy, but alas, we don't have such world.