Wordpress nuances of paid themes?

Question

CMS

I decided to master CMS wordpress for general development. But here's what I can't understand specifically about paid topics.
There are resources with paid themes. What exactly does buying a theme give? How many times and what is the installation limit. If for a single product, can it be disabled on one product and enabled on another?
How does the theme behave when editing the source code?
What kind of licenses are there?
How is it tracked that a theme is installed more than once.
Advise where you can watch paid topics and what aspects you need to pay attention to.

Answer 1

Answers to absolutely all your questions are in stores that sell themes.
Best theme marketplace: themeforest.net . Usually the license goes single site (one purchase - one domain). There are usually no technical restrictions on installation. Everything is purely on your conscience. But if you break the rules and put the theme on several sites, be prepared for the fact that you will be denied technical support. Yes, and it's ugly - you need to respect the work of developers.
You can edit the theme as you like and as much as you like. It's best to make changes through child themes (usually included with every theme you buy) - this way you will ensure yourself painless updates (which, by the way, are free).