How effective is binding to the server ip to protect the program from copying?

Question

Burglary protection

How effective is binding to the server ip to protect a program written in C ++ from copying?
I have no desire to invent overly strong methods of copy protection, especially if they will reduce the reliability of the program. But I want to insert something simple that will not allow "Forget" to pay for the license on time. The circle of users is not very large, and consists mainly of php programmers
How much should a program written in C ++ cost so that someone decides to spend their time unbinding the program to the server ip instead of paying for another license?
And in general, is it worth binding to the server ip or is it better to use some other method of protection?

Answer 1

The key on your public DNS server in the form of a TXT record based on information from the public DNS server (in the program, the formation and verification formula):
1. 2nd-level domain name (where your program works)
2. all linked to the domain IP addresses.
3. domain name registration date
If the server is internal, it is enough to make a binding to the processor ID and MAC addresses of all network cards.

Answer 2

Do SaaS and don't suffer.