It is their way of gaining money...simple as that. Plus, if you do not run premium tanks/account, get some low tier tanks such as tier 5s...you will have to grind it out that way. WG designed the game to be free to play, but once you get higher up in battles, free to play still is in effect, just now it is MUCH harder to maintain...and it really is not harming tier 10 MM, you see LOTS of tier 10s running around. Whether those guys have premium accounts is not known, but what IS known is that most tier 10s are designed to be for CW, you only play it in pubs FOR FUN and to get daily doubles in for some extra free xp. If you are still going with free to play and are grinding tier 10, play it just to play it for fun in a pub match. Join CW and use it there since if you win you could hold onto land and get gold...tier 10s are meant to be tanks that are fun and dominating, not meant to make credits, it is designed like that. And it really does not effect my gameplay, I grinded free, non premium, no premium tanks from tier 1 to tier 10, took me about 6 months. Then I got sick of the grind and bought the Type 59 when it was available, now I don't have to worry about credits. Honestly, tier 10s are not meant to gain money what so ever, they are made to LOSE money so you are forced to grind low tiers or buy premium tanks...it is WG's way to make money, please note that WG company has to MAKE MONEY in order to develop the game...if you are a free loader...it is great since you are taking advantage of the good old, "F2P" concept, but you just have to bite it and grind it. WG has to make money too you know?