@Ayreos part of the reason of the boom of Pulp fiction and the boom of Isekai is yes they are cheap and profitable. The other part that fuels their consumption is society in the 1930's U.S. had a.... shall we say negative world view and wanted quick easy escapism and similar feelings exist...
Soo..... the master swordsman is a cannibal who is raising two twisted little psychopaths. The hero is already so warped by revenge he is gonna wipe out the swordmaster's family for shits and giggles. Man is this manga dark and twisted.
Gotta say the way @yunomi up and just advertised being the "one with integrity" and leaving really highlights the questionable actions and reason behind the scanlators leaving.