Even if your numbers are true. Mastodon has existed for 7 years. Bluesky for less than one.
So logically the precentage of users to active users should be much higher on Bluesky.
Also number of accounts is possibly a bad metric to judge mastodon because of the federation.
For example, I have 8 mastodon accounts (tried a couple different instances and programmed a couple rss bots to give me a news feed).