Does anyone know what the purpose of this 'eye' icon is?
When left-clicked, the card goes out of focus, then back into focus when left-clicked again.

@DrDoom9 - it totaly hides the card from your sight almost as if you had never bought it (but without it reappearing in the store). If you click it on the card's details page and then go to the My Collection page then the card will have disappeared. You can get it back by using the View menu to see which cards you have hidden this way and then clicking on the eye again.

It was probably added because some people had been asking for the abilty to get rid of cards they didn't like and not be reminded that they had bought them.

@gkar45
I have taken a screenshot of it before and after clicking on the icon.

@TheEmu
Thanks. There are one or two cards I wish I had not bought, but I just deactivate them. One could delete them, but it seems rather perverse to deny one's history to oneself.

@DrDoom9

but it seems rather perverse to deny one's history to oneself.

That is what I thought as well - but a few people insisted that just disabling and deleting the cards was not enough and that they wanted no references to them in their collections. What they often asked for (the ability to return cards they didn't like) would have resulted in the cards reappearing in their girl's store, preview pushes and in special offers with random card selections - so they would have been in danger of buying them again !

@DrDoom9

1. Activate the Card again through the Eyeball Symbol.
2. Delete the Card (click on the Garbage can), so that you are no longer be able to play her Show.
3. Access the following Directory, where you can find the Card/Model Information.

https://www.istripper.com/forum/thread/37892/3#post653424

Alles über iStripper / Customization

is there an easier way to find the models folder in the My Collection View Click on the Model to show the Details View Then Click on the Clip list Icon. in the Clip list you will See the Card Letter a...

4. Delete! not move in your Garbage can! all the Content in this Folder.
5. Go one Step back, right click on that specific Folder f0644 in this case.
6. Right Click on the Folder and, set the Folder to READ ONLY!

https://www.oreilly.com/library/view/windows-server-cookbook/0596006330/ch04s14.html
or use the Command Line in Windows.
https://www.youtube.com/watch?v=9QralfKAFr0

7. Restart! iStripper
8. You should now have an empty Card in your Collection (see my example on the Screenshot)
9. Hide the Card again through the Eyeball Symbol!

The Read only Option avoids that the Card appears again after an Update or Synchronize with the Server.
Hope this Helps.