I've been using this platform for several months. It's quite difficult to earn money here, as surveys come infrequently; there are very few of them. The maximum I've managed to get is 5 surveys in a month. Payment varies from 20 to 100 rubles per survey, depending on its length. In the end, you can earn no more than 400 rubles in a month. You can use the service for entertainment, but if your goal is to earn money from surveys, it's better to consider participating in paid focus groups.
