@matt @thisismissem WP_Cron will not be triggered by external calls (at least not by ActivityPub). It might be the default behaviour, but then it shouldn't cause a lot of load if there is nothing to trigger.
It's very hard to get a page cached properly on a small/low price hosting plan. Cloudflare has some issues with ActivityPub requests: https://dustinrue.com/2023/09/wordpress-activitypub-and-cloudflare/ and caching does not always vary between Browser Calls and ActivityPub Calls: https://github.com/Automattic/wordpress-activitypub/issues/580