a short info (thanks to DEXXXXXTER and Asmodeus for noticing this) – as you know, we have the “Military Parade” special, celebrating the end of the Second World War. As a part of it, you can buy tier 8 Super Pershing with a 15 percent discount.
If you do that (buy it with discount) AND you fulfill the Super Pershing mission after that, you will recieve the gold compensation of full Super Pershing price, eg. you will get 15 percent more gold, than you spent for the Superpershing.
I am always reluctant to post this kind of info, because by now you must have figured out that this is not an “oversight”, but completely intentional move by Wargaming EU to make you actually buy that thing AND to make you play the (rather difficult) mission (eg. play as much as possible, perhaps spend gold during your play etc.) – up to you, whether you take the deal or not of course, but… well, I won’t.