Used to be good and people could just share links and be merry, but then the site had a massive influx of users that would just spam threads with '+1' and various repeated posts of requests for links (often when a link was already present in a few previous posts and the OP to boot). For a taste of how it was, take a look at any popular threads on f95zone with the hordes of unwashed ESL beggars scrambling over each other to be the first pervert in the favela to get a free copy of 'Fat Futa Western Girl Funny Adventure 16 - Now with twice the funny plot and biting social commentary!'. The types of users who'd shit up threads with their dirty, filthy, shit-covered hands, overly entitled whining because their hundred-rupee potato laptop from 1999 can't run a 3D game coded in unity, and incessant demands that 'normal' users create mods to 'open shoe, show feet'.
To add to that they always just begged and did nothing else, no sharing themselves because god forbid they actually put the effort in to share which they themselves so desperately thirst for. The bloody 'Where is admin?' spambots have a more varied script then these pitiful great unwashed. Mods got sick of it (and certain users probably went a bit too hard with the bullying of said hentai untouchables) so the 'no begging for links' rule was established.
What a lot of people seem to miss however is that you can still post links in a thread to share with other users (as long as there's no loli/shota) without penalty. People just stopped doing it, with many regular users just forming their own connections with other reliable deviants.
TLDR: ESL disposable accounts got annoying, you can still share links just not ask for them.