Just if someone wonders:
Simple because it's improper to share the Dhamma via the marked, as well as it is improper to sign contracts with anybody in relation with the Sanghas heritage.
At least, when not leaving home and approach the Gems like a constumer, it's actually of no use, no benefit, and merely would promote one toward wrong view and increase bonds to whats bond to the world.
It's by the way not because there is any phobia of tracking or any "privacy-noia" that one, by trust into more virtuous ways, would be seldom tracked, aside of personal efforts, seeking to follow ways out.
Most, how ever, feel not comfortable if there is no cheating like "we give you control" or "you deserve it" or "we do the work for you".
Not to forget how dare it would be to use not really given, or to gain from "thievery" undertakings without even paying back.
(Links elsewhere, in "dhammic" marked areas and those with less regard toward the Gems, are mostly censured and regarded as not supportive for gains.)