Because I also started playing on one other site, where there are no ads and after coming to know that, it felt like very distracting with ads.
Of course I do. It's not just the distraction part of it. With the stupid third-party ad server system that Chess.com uses, malvertising attacks are a very real concern, and they DO happen periodically. Management likes the income from the ads, so they live with the problem and only clean things up after malvertising occurs. Of course, by then, your system has already been compromised.
Because I also started playing on one other site, where there are no ads and after coming to know that, it felt like very distracting with ads.