if you want points.If we think about the same quest, you don't actually complete the quest, so you don't get anything from it, as you just do the fight and then abort the quest.
what if you want coins .. ?
UBQ's can produce Coins/Supplies in several Eras, In Iron Age for example with a 120lvl CF you would produce like, idk say 4m Coins/Supplies every day ?
EMA HMA LMA even CE TE you could produce coins, if you had CF 180lvl (leveling costs are getting insane - but say that it is realistic in our days) you would be making 50m ? 100m ? 500m ... ?
Compare those Eras now with SAAB and SAV... i have no idea what is the base Coin reward there, but i am sure that it is bigger than TE (way bigger actually lol) and you have to invest what ? 1 auto fight with not even taking damage ? and accepting a trade of 500x500 goods ?
well, not my job to find what they meant by saying "we fixed an exploit where players would make infinite coins/supplies(?)" but if something comes to mind, it's the quests i said ...
anyways just my thoughts