«To conduct its research, the Internet Observatory scanned the 25 most popular Mastodon instances for CSAM.» Are you saying that the 25 most popular instances a

«To conduct its research, the Internet Observatory scanned the 25 most popular Mastodon instances for CSAM.» Are you saying that the 25 most popular instances aren't good? Or that what the researchers found is the last 10%, after 90% has been blocked? Or something else, and I misunderstand?