I know what it means to “own” digital games in this day and age, but I bought them, so it seems logical for me to add them to my collection – the site gives you the option to, and it even tracks them separately, so. Besides, whenever I purchase any one of these type of games, I make sure to back them up at least twice, in a way kind of making them mine.
Regardless, I can see why some wouldn’t add them to their collection and fully respect that.