How much does شرح رياض الصالحين - ابن عثيمين earn?

Book: Explanation of Riyadh Al-Salihin The author: Muhammad bin Saleh bin Muhammad Al-Uthaymeen (deceased: 1421 AH) Source: Golden Comprehensive ◉◉◉◉◉◉◉◉ ◉◉◉◉◉◉◉◉ The most important features of the program: search : ◉ Comprehensive research in the book. ◉ Searchable section within each subsection separately. ◉ A section to search within a specified number of sections according to what the user wants. ◉ A section for internal search for the chapters of each book. ◉ Section to sear…

Book: Explanation of Riyadh Al-Salihin
The author: Muhammad bin Saleh bin Muhammad Al-Uthaymeen (deceased: 1421 AH)

Source: Golden Comprehensive
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The most important features of the program:

search :
◉ Comprehensive research in the book.
◉ Searchable section within each subsection separately.
◉ A section to search within a specified number of sections according to what the user wants.
◉ A section for internal search for the chapters of each book.
◉ Section to search within each section independently.

lines :
◉ The ability to change the font size.
◉ The ability to change the font color.
◉ The ability to change the font shape within 8 Arabic fonts.

Colors and backgrounds:
◉ The possibility of changing the background color of reading the page to hundreds of colors.
◉ The ability to set photo backgrounds as a background for comfortable reading.
◉ The ability to change the color of the theme in hundreds of colors.

Lists:
◉ A list of the names of the main sections of the book.
◉ A list of the chapters of each book separately.
◉ A side menu containing all the chapters of the book for quick display and transition between them.
◉ A list of favorites that includes saved books and another for saved doors.
◉ A list of your notes and thoughts about each section independently.

reading :
◉ The ability to continue reading at the last line reached in the reading automatically.
◉ The ability to display the screen completely or normally.
◉ The possibility of displaying the doors with a comfortable night reading system.
◉ Move between the next and previous chapters from the same reading page.

Settings :
◉ The ability to change the language of the application to ten different languages.
◉ The ability to download lines automatically without touching the screen.
◉ There is a timer to set the time period for automatic reading and exit.
◉ Determine the distance between the lines for a clearer and larger view as needed.
◉ Go directly to the beginning and end of the page.
◉ The ability to write down, modify and delete your notes and thoughts.
◉ The possibility of resetting the program settings and returning it to the default.

Copying and sharing:
◉ The ability to fully copy and share any section.
◉ The possibility of copying and sharing any specific part of the section through prolonged pressure.
◉ The ability to share and evaluate the application.