Discuss why spyware has become so widely used. Should spyware be allowed to be used as it is or restricted in some manner?

Discuss why spyware has become so widely used. Should spyware be allowed to be used as it is or restricted in some manner?
 
Course Textbook(s)
Gregg, M. & Santos, O. (2020). Certified ethical hacker (CEH) version 10 cert guide: Learn, prepare, and practice for exam

success (3rd ed.). Pearson IT Certification. https://online.vitalsource.com/#/books/9780135305393