People certainly want to add extra oomph to posts. I could picture it being used either instead of or in addition to some of the emoji in a typical emoji-heavy pieces of content like this: https://twitter.com/MetroUK/status/1266078167590219776 (Not on twitter unless twitter implements this, but on the web)

I cannot wait for zalgo and these things are combined with text effects to create the ultimate abomination.