Update on February 17, 2018: It seems the list of themes that require activation before installing is increasing and I will keep updating my list regularly.
Recently I noticed that a lot of theme authors would force you to activate your theme before being able to properly install it or even install the demo content that comes with the theme, and here is an example of that I saw recently from with the following two themes:
The Gem Theme:
I wonder how do you see this step and do you feel theme authors have the right to do that or should this be an optional step?
Would love to hear your feedback on this and where you think this is going to be a standard practice in the near future.
Please, comment below and share your opinion with this step.