The Mastodon instance run by @digitalcourage has a maximum toot length of 1024, and the NGO that runs it actively encourages journalists to join the fediverse.
An account costs 1€/month. Most of the local toots are in German, but most users read English, too.
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!