Can a banned player return by making new accounts?

Without making the site pay only, as a way to link an real life name to an account, it is impossible to completely stop a motivated person with enough knowledge off the site. Then that would create a financial disincentive along with banning the use of the same payment method for future accounts in the case of extreme TOS violations (and that isn't necessarily a guarantee).

Isn't chess.com a pay only site? Also I did not use my credit card to pay for my membership. I used my google play account so chess.com still won't know the identity of the person. Same with those who pay via other ways such as iTunes account. 

Isn't chess.com a pay only site? Also I did not use my credit card to pay for my membership. I used my google play account so chess.com still won't know the identity of the person. Same with those who pay via other ways such as iTunes account. 

How about if suhm1 buys a new computer and creates a new password such as •••••••••• and uses that to cre8 a new account and spam or cheat?

The site could theoretically tie the account to the Google account or iTunes account when paying and the ban those accounts for someone if they closed the account. That's what I'm saying, paying for a premium membership allows attaching a member to a payment method and would make it easier to block, but it would still be possible to bypass that.

Real name ID would be the most fool-proof way but that costs money and if that was something the site required, would drop the number of players/members by a lot. That isn't a business model the site really wants.

If someone has to buy a new computer every time they want to create a new account here, that's a huge expenditure of $ and effort - the overwhleming majority of people aren't going to do that.

Chess.com is not a "pay only" site - anyone can be a basic member and play chess and participate in the forums, but they don't get access to the premium features and will get ads from a 3rd party provider.

You can choose to become a premium member, where you pay a subscription fee and get access to those additional features and aren't shown any more ads. There's 3 tiers of premium membership with increasing benefits: see https://www.chess.com/membership

It's really up to each person to decide what sort of features they are willing to pay for and what extent they want to support the site: long before I was a moderator, I was happy to be a gold member and pay that amount to get rid of the ads.

Moderators don't have the authority to make that sort of decision, but Chess.com does allow people a 2nd chance if they own their behaviour, apologise, and promise not to do it again. An account closed for Fair Play violations is never re-opened, but they may be allowed a new account, and an account closed for Abuse may be re-opened. People only get 1 second chance, though, and if they blow that one, they don't get any more. They also don't get to lie about their re-instatement in the public forums and pretend that Chess.com made a mistake.

why can't accounts closed for fair play be reopened but accounts closed for abuse can

We can delete the abuse that caused an account to be closed. We don't delete the games played by an account closed for Fair Play violations, but those games shouldn't count towards that person's second chance history or rating.

so are you saying that bad actions can be reversed but not cheating?

IP bans are not reliable as many users have IP's that change often (mine does if I restart my router or it restarts itself). Also many users may share the same IP so innocent people could get blocked. And yes there is the option to mask IP addresses using proxy servers and the like. The subject of IP bans has been discussed on occasion elsewhere in the forums I believe.

Essentially the attacker (in this case the banned user) has an easier job than the defender (chess.com in this case). The defender must plug all holes and the attacker only needs to find one. But as David says they will likely repeat the same mistakes again and get banned again. In some cases it is probably a never ending cycle of ban-new account-ban-new account-etc...

Bad content can be deleted and they have no bearing on the ongoing status of the account. Games are never deleted, although we can give other people their rating points back.

so does that mean that it's better to be mean than to be a cheater?

Moderators don't have the authority to make that sort of decision, but Chess.com does allow people a 2nd chance if they own their behaviour, apologise, and promise not to do it again. An account closed for Fair Play violations is never re-opened, but they may be allowed a new account, and an account closed for Abuse may be re-opened. People only get 1 second chance, though, and if they blow that one, they don't get any more. They also don't get to lie about their re-instatement in the public forums and pretend that Chess.com made a mistake.

Isn't there always a chance that they made a mistake tho?

my friend .... just got banned and i what to know can he  come back from his account