The algorithm for advertising charitable fees (like any advertising in general) is configured in such a way that the more often the user follows the link and transfers money to someone for treatment, the more such ads are poured to him "in gratitude." As a result, the one who is inclined to feel sympathy (or guilt, it doesn't matter), when looking at the next sick child, in a month will be attacked by such a dense "carpet bombardment" of charitable posts that in another two months he will begin to hate them...