Twitter’s new policies surrounding its application programming interface (API) have just gone into effect — and they will have broad implications for social media bots, both good (RSS integrations, say) and evil (political influencer campaigns), researchers note.

On Feb. 2, the Twitter dev team announced that the site would no longer provide free access to its API, starting on Feb. 9. After some negative publicity, Elon Musk personally provided an amendment — that Twitter would continue to service “a light, write-only API for bots providing good content that is free.”