i havent played this tournament, but in previous one for some reason sometimes I had them and sometimes not.. I dont even know if i just failed to observe it properly, or what even happened there... but im 100% sure that i was top player in losing team and never got fortune key at least once.

As my previous post. I stopped playing tournament for the time being. Any "ninja" changes are news to me. 

Received only credits

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I'd confirm the specifics of the ranks which don't get certain rewards for losses in the coming week.

Thanks. Having the rewards for all positions be known (like other events) would be nice.

Losses don't give acoins, but fortune keys and credits are given. 

In general, players still can receive Credits and Fortune Keys when they lose, but it depends on their League and place in the top in a particular battle. Thus, technically it's possible, but players in the lower Leagues won't receive any. Since rewards are percentage based and rounded after placement multipliers, ranks with low payouts will give you nothing if you place low enough. 

i assume professional 1 doesnt give fortune keys and it will start from expert 3. we will find out :)

Thanks. I was top loser yesterday in an expert 1 match and got a fortune key. It's possible that in the previous tournament series I noticed this at the same rank and level.

Yeah probably expert 2 or expert 1 (the latter being where I got one, and expert 3 being where I didn't).