I honestly do not know how a software company can survive asking to pay only a few dollars for a lifetime of use, without other forms of income from the same application. I do not know what the remains of the full amount we pay in Google Play.
Therefore hope that we can get an application by those who work for the busimess, free of advertising or even lawful use of personal data, it is something quite improbable. Nobody works for the glory, some volunteers for their own pleasure and to help others, but often is converted to hard cash ...
It would be interesting to understand why pushed Kostya one hand, MobiSystems other, but I can imagine, both legitimate, but opposite in intent ... maybe.