To preface this, I'm a good (blue/purple) player. This week I took up grinding the E 50 M because big fast ram tonk sounds fun. Unbeknownst to me, however, there is a "OOF ALL MAUS FANBOYS" mission going on right now.
It's made the grind simultaneously frustrating and entertaining. I didn't suspect anything was up until a full-HP enemy Object 704 rushed me (I was at 500HP); he killed me but got demolished for it. I thought, "what a silly thing to do". But then those moments kept happening. It's not like I've been performing poorly in the E 50: 2k average damage per game, but for some reason (curse?) only a 48% win rate. I intend to raise those both as the stock grind was cancer.
Unfortunately, the E 50 has really been showing its age. I'll have to decide when I play the E 50 M. The turret on this thing just doesn't bounce shells, however the gun sticking out of it is quite good.
I suppose my experience with the E 50 may be too unique, because as I said before, it has a giant "KILL ME FOR MISSION PROGRESSION" target painted on.
I will however accept thank you's for being a source of your mission progression**
Source: https://www.reddit.com/r/WorldofTanks/comments/h7s75e/my_mistake_of_grinding_the_e_50_m_during_the/