Good on you to notice the link in Swarm. To Clarify, there are now 2 categories for retention:
a) Retention by activity
b) Retention by HP

The first qualifies if there has been an activity in the past 2 months.
The latter qualifies for an account that has more than 100 HP.

Super retained is an account that qualifies for both.

Now this data can also be construed in various ways, but there will be a post coming up that will tackle the complete analysis. For example: An Account which is qualified as Retention by activity is essentially an extractor account since they don't have even a 100 HP after a year and so on..

Also a correction: 2024 holds the data ONLY for the people onboarded in 2024 which is 63K, and 2025 holds the data ONLY for the people onboarded in 2025 which is around 25k.

The data has been taken from the chain, the only thing in work is the presentation and filtering aspect of it.

If you have any further questions let me know.