The developers called that as anti dump mechanism which is a very dumb mechanism. People able to buy with all of their money instantly but the developers were limiting them to sell. The developers of afterburner pure scammers. People must be careful. Anti dump mechanism was bs that used by team to fool the investors. They have control over it,. I have seen such mechanism before, the dev was trying to get more and more liqudiity and they will dump their own token
I've also just heard of such a system, and it sounds like a system that cheats investors. imagine, if an investor invests $1k in the project, and to sell his assets, he can only get 3% per day, and that means, every day, 3% of the total assets he owns keep decreasing. for example when he has $1000 ARB, and 3% of that is 30$, so he has $970 ARB remaining. The next day, he couldn't withdraw any more $30 ARB, but that was 3% of $970, or about $29.1, and it was going down every day.
It's pretty funny. as you said, the investor buys it instantly, and when the investor wants to sell the asset, it can't be done. it's like the Dev is not ready to risk a dump. this also makes me think that the devs are not confident with the project they are developing, because they predict that investors will sell their assets instantly. therefore, they do this.