Advertising available to everyone is nice, but how can you be sure that the application will not be used for the purpose of illegal earnings? Do you have some kind of anti-hacking system?
Yes, you correctly noted that the system can attract fraudsters due to the possibility of earning from the displays. We have an anti-cheat system that will monitor screen activity and prevent the user from deceiving advertisers. We described this in more detail in the technical white paper
https://hygh.tech/docs/HYGH-Technical-White-Paper.pdf