I started using the service last year. It is really excellent. It’s convenient to top up advertising accounts in various systems with its help. It might seem easier to do this separately, like before, but first of all, it’s much more convenient. You deposit money in one place (by the way, there are plenty of ways to top up) and just distribute it. Secondly, in some cases, you can even get a bonus. So, in addition to convenience, there’s also a benefit. There are no hidden pitfalls or fees.
