Getting top rank(kog) isn't that expensive earlier it was purely f2p with sylvan, fur hire,koaki.. now a little more expensive but samurai did the job and budget investment like ancient gears also competitive. Right now there's no low budget kog worthy deck available i think.. maybe darklords or something from new box like metaphysics or something became top tier
It does, and the balance isn't too far off really. I think the right level of gems given out should equal enough to get 1 copy of each card in a box (not more) when they are released. To get more copies you should either need to pay or skip a previous box to save gems. Right now I think there is just slightly too few gems given or boxes released slightly too often for this to be the case.
Because the game has global reach, and not all players come from Countries with currencies with appreciation close to that of DOLLAR. What makes the game is on average 3 to 8 times more expensive in this Countries. Therefore, gems are more fundamental to some than to others.