No. Whether something is a rip off or not isn’t determined by whether it’s an essential item or a luxury item. That is completely irrelevant.
There’s a couple of different definitions and usages of the word. The main one refers to a product being of poor value. Value is generally determined by factors such as the cost of the item to buy, and the quality of it. I’d say that this is a subjective term, but when you consider that eSports packs cost a fairly large sum of money and is subject to RNG, then the majority of fans will argue that it’s poor value. The hardcore fans will still buy it, but this is out of loyalty and passion for the game. It doesn’t mean they feel that they are getting value.
The other definition of a rip-off, is a fraudulant product, for example forgeries or bootlegs.