On average, they're getting <9,000 views per post on X. With 100 - 150K followers on both Bluesky and Mastodon, I'd expect their impressions to beat those X numbers.

But as they say in the article, their reason for leaving isn't solely the low impressions. It's the low impressions, plus "Musk fired the entire human rights team and laid off staffers in countries where the company previously fought off censorship demands from repressive regimes," plus X's unwillingness to give users more control, consider end-to-end DM encryption, or offer transparent moderation.