They were giving away diamond memberships to "bad ad" reporters not long ago, so it's a known problem. The ad agencies have certain guidelines from chess.com, but don't always follow them. Anyway, here's the link:
http://www.chess.com/blog/webmaster/get-diamond-benefits-for-helping-us-fight-quotbad-adsquot
Can't stay connected, overun by ads
Can't stay connected, overun by ads
Pretty much my own problem (though I've ad-blocker so don't actually see the off-site ads). Live chess became impractical for me (more than 80% of my game match-ups were aborting due to my response becoming too delayed).
This site never used to be anywhere near this bad so I suppose it's the ads or the way they're now running. If the site doesn't actually pre-screen the ads (or filter out the too data intense ones) then we're at the advertisers' mercy as to just how swamped our connections become.
sftac
Try to disable adobe flash player before login in to chess.com.
Here's how to do it on every web browser: http://www.howtogeek.com/222275/how-to-uninstall-and-disable-flash-in-every-web-browser/
Or you can use a browser addon to deal with flash player on a site per site basis:
FlashControl for Chrome: https://chrome.google.com/webstore/detail/flashcontrol/mfidmkgnfgnkihnjeklbekckimkipmoe
And FlashBlock for Firefox: https://addons.mozilla.org/fr/firefox/addon/flashblock/
This should get rid of the ''flashy ads'' with sounds of animation that can popup at random during a chess game. By disabling the flash plugin or simply activating it on a case by case basis it prevents the content of these annoying ads from loading at all.
Then another game was interrupted with an advisory that claimed to be from Microsoft. It claimed that my computer had been infected by malware and gave a number to call. I wrote the number down and restarted. The number is 844-261-0985. I googled the number and found many complaints. Apparently it's the latest scam. Somehow it is able to replace the game window with the scam window. I hope chess.com is aware of this and doing something about it.
Then another game was interrupted with an advisory that claimed to be from Microsoft. It claimed that my computer had been infected by malware and gave a number to call. I wrote the number down and restarted. The number is 844-261-0985. I googled the number and found many complaints. Apparently it's the latest scam. Somehow it is able to replace the game window with the scam window. I hope chess.com is aware of this and doing something about it.
Your computer might be infected with malvertising. I suggest you run a full scan with Malwarebytes Anti-Malware (https://fr.malwarebytes.org/) and if your computer is clean and the problem persist, please contact the administration.
Chess.com is aware of the problem
3 hours ago · Quote · #3145
I just got "hit" with this SPAM message, originiating from your web site.
I don't see how that sort of thing would come from chess.com - I'd say that your PC picked up that virus from something else, and it happened to appear while you were playing chess here. Chess.com doesn't download any software to your PC at all - if you clicked on one of the ads, that may have done something, but we'd need to know which ad it was, because we could then talk to the ad provider about it (and have done so in the past, albeit for inappropriate ads rather than malicious ones).
Get an ad blocker and stop making 10,000 threads on same/similar topic 
This has happened to me a couple of times lately. In the middle of a game the board window is replaced with an ad that seems to have infiltrated the site. When I delete the ad, the chess site closes too. By the time I log back on, I've lost the game by abandonment. Has anyone else had this issue recently?