I'd guess something like 99% of members never post anything... and 99% of people who do post aren't abusive trolls who name change to grief people. Meaning this policy has a large benefit to cost ratio. You provide a harmless service to the vast majority of your members, while only disrupting a few kid shenanigans.
And if someone is being abusive to the point of needing to be muted or banned, all you have to do is report them. Changing their name isn't going to save them.
Okay, so your saying if User1 is flagged by Chess.com as a know "troublemaker", then their chess criminal record with transfer with them if they change to User2?
Maybe it's a generational thing, but I've never changed my user name on any platform.
STATUS: ANSWERED
COMMENTS: I never received an official response from Chess.com, but the best answer received was from a female user who suggested that the ability to change her name is beneficial when females get harassed or stalked on chess.com. On the downside, I think the ability for a user to repeatedly change their name allows them to create mischief under one name, and then change names when they start feeling the heat from others on the platform.
QUESTION: With the prevalence of cheating, harassment, trolling, and general mischief on Chess.com... why do you allow users to change their Usernames every 90-days?
This practice almost encourages trouble-makers to wear-out their welcome with one username, and then change to another disguise every three months.