When I registered, I hoped that I would be able to follow not only my friends but also any users, including those with private accounts, read their messages, and so on. However, unfortunately, that's not the case – only open information is available, and statistics can only be gathered from public profiles. If an account is private, you'll first have to add the person as a friend and then log into the service through VK. Overall, it's an interesting tool, but the price is a bit high. In reality, you don't get anything special, as the service only works with open data (forget about reading someone else's messages). It's just a time-saver and minimizes the risk of accidentally liking something or revealing yourself while stalking someone. The user has no idea that you're using this service to observe them. So, you can only find out when a person was online, who they exchange likes with, and similar things.
