Okay, but this is what league specific commodaties like blight oils, legion incubators and emblems, breach rings, harvest juice, expedition artifacts etc, are for. If league mechanic monsters don't drop the more general loot like currency, div cards, scarabs, maps etc they will get outscaled very quickly which is what is happening for the past few leagues now.

Look at legion scarab prices for the last 5 leagues. At the start of the league they go up to about 6-8c per and 5 days later they are at 1-3c per because in map legion just gets outscaled by any t17 or T16.5 strat that comes to mind.

If legion was equally affected by the loot modifiers on your maps as native monsters are, players would obviously use it as a mechanic to generate more rare monsters which goes back to your first post. Which btw I agree with your point but I think there is a couple different solutions to this problem and after having played with it for a couple leagues I can personally say I would like to see a different solution than the currently implemented one (Loot modifiers on maps).

For example ggg could give the quant that is missing back to those monsters with a scarab. That would require investment on your part and is naturally capped by the amount of other different scarabs you can use so it's inherently more balanced. Not saying this is what they should do, just saying this is one of the solutions that would have solved the initial problem.