your making false economics,
if multiples of the same content exists on platform decrease the value of the space used and the space next to,
also due to googles search algorithms copy and pasted reposted links dont search rank well at all further lessing value of reposts
the difference between here and Facebook and reddit is its supposed to be all original content and free from spam by users participation but no incentive to flag and risks from mass spam flaggers with no support in place