But if the antivirus can prevent hackers attacks it will save the user a lot of money. If it will prevert 100 attacts it is a very good antivirus

Only a big users or companies attract so many hackers

I do not think that hackers will attack a simple user so often.
You cannot know for sure! But if I'm not mistaken, then all the same, the project will have a fixed payment after exceeding a certain limit of attacks on your computer.