The quality of the followers is limited by what the Instagram platform itself allows. Sellers can't just send super realistic accounts, because they're expensive to produce and expensive to buy. It would be too expensive to hire thousands of real people to follow an account, and too expensive and time consuming to build up thousands of accounts that look like real people, with pictures, posts, stories and highlights. Realistically, it could take millions of dollars.
So sellers are limited to the quality that can be profitable in the time window the accounts live, because Instagram has a constant fight with services like these. No follower bot will last forever. Some will last for years, but none will last forever. And since sellers can't affect how often Instagram updates or purges the fake followers, the supply and retention rates are basically the same.
Our tests were done by purchasing to one account per seller, with the "Flag for review" option in Instagram disabled to maximize retention and delivery. Results with the flag on can be different, especially in August to November 2026, which has had a lot of variance, and followers can drop unexpectedly. We are sure that if we purchased to 100 different accounts from each seller, the retention rate would be basically the same. So these retention rates don't really mean much, because at the end of the day, Instagram is the king and decides how long the accounts live and which quality survives.
We recommend simply picking by your needs: payment methods, slow delivery, warranties and the pricing you can afford. From our tests, the basic tiers of followers are all basically the same: the same realistic looking accounts, with retention rates too similar to call anyone bad.