They posted an update:

4hours later I now have a complete marketing department of agents, it works pretty well actually. I gave it a high level task around building a full campaign, and it is. Here is the social media manager agent off on it’s own composing the tweets, the social media manager agent is build with 4 internal agents, but calls out to my hackernews agent and my google search agent when needed. It actually works super well… you can see it running here, the manager even told it to do all the tweets for the year, so I presume it’s going to stop at 365 tweets, https://s.h4x.club/eDubwABJ

So their use case appears to be effective spam distribution, or “social media marketing campaigns”.