Cashbox.ru could have been a great platform for online side jobs, but unfortunately, that hasn't happened. There are very few tasks available, and even a lucrative affiliate program doesn't save the situation. Although the site is well-designed and protected by Webmoney. If you're just starting to earn money online, you can give it a try, but it's worth noting that I'm writing from the perspective of a performer and have not been an advertiser. It's better to pay attention to more popular sites with similar opportunities. Moreover, payments are only made through Webmoney, and many users dislike this not-so-convenient payment system.
