Not Ferrari, Mercedes maybe.I know several Bty users. Most of them have been using Tenergy for a long time...
My club has a discount program with the main Butterfly distributor in France and I'm in charge of purchasing material and equipment for the club and members from them and also other store partners.
We have -15% (more on clothing and tables) on all Butterfly blades and rubbers except Tenergy and Dignics (-10%).
Having direct communication with the manager, he explained to me something I already expected, that the profit margin on Tenergy and Dignics was very low, and he'd rather sell a sheet of Sriver or Rozena where the profit is much higher (you'll often see Rozena at -10€ like it is currently on sale, because they can, whereas they can't afford to with Tenergy and Dignics).
The R&D, cost and marketing of making these high-end rubbers is very high, especially for Butterfly who makes everything in-house unlike other brands who go through ESN and others. The cost of older products like Sriver, or products like Rozena (which was an offshoot of the R&D done for Tenergy) is low, and the marketing is low as well since there's no sponsoring attached to these products.
Marketing and sponsorship is an important cost as it drives sales and gives you the edge over your competitors. Even if the margins are lowered, you gotta keep that edge. Also, sponsorship is what allows the pros we like to watch to make a decent living, and the sport to grow.
Finally, not all Butterfly products are expensive and there are also plenty very good cheaper alternatives from other brands, like you mentioned Rakza 7 (ESN), for example. You don't have to like their prices, but it's important to keep things in perspective and not rail on them, because their margins are low and there are good reasons why (factories, machinery, repairs, overhead costs, staff, Made in Japan/Germany/Sweden, distribution, R&D, marketing, sponsorship, middle men...).