That's fascinating. I did basically the exact same thing after joining Mastodon a couple of weeks ago and used an identical tech stack (Python Lambda as well as DynamoDB on AWS). But instead of Ars Technica I created a bot for Planet PostgreSQL [1]: https://botsin.space/@planetpostgresql. In case anyone wants to do something similar but does not run an own instance - botsin.space is a dedicated place for bots [2].

[1] https://planet.postgresql.org [2] https://botsin.space