Sure there is. When SN gets tired of wasting a couple BTC a month on hosting due to slop, and the beloved team proclaims "screw you guys we're going home", that limit was reached. It's just that some things were foreseen early on with Bitcoin, which makes sense for a p2p system, and a limit was built in and later enlarged, and there are limits you can set to upload for example, to deal with this.

Ultimately the non-filter solution that we use on SN (downzap = we spend money to keep it clean-ish and disincentivize spam) is possible on Bitcoin too; it has been the top boost for a while now: #1077925