It was one feeder, which I did not even remember to fill up all the time. Yet I ended up with dozens of birds hanging around my yard. The food would be gone within hours of refilling.
I’ve since come to the conclusion that it is not a good idea to feed wild animals, regardless of the motivation.
I saw a warning at Yellowstone not to feed the wild animals because they become dependent on the handouts, it is not as healthy for them, and they lose the ability to forage. The same dynamic applies to birds in the yard.
I admit, I do plant flowers to attract bees. But I am not really doing anything against the nature of bees, because flower nectar is their natural food, and they do have to forage to find the flowers.
Some species can be a problem in some areas. Grackles, starlings, and sparrows being the biggest offenders.