Achievements

World of Warplanes has, as an addition to silver, gold and free exp, 4th currency - tokens.
They are obtainable for daily missions, that deserve separate article, and for epic achievements that can be achieved in battle.
In theory it's great, in practice - not so.

As almost everything, the chance to score an epic achievement in battle can be rigged at the start of the battle, in very easy way.
The most obvious, but not the most significant, is tier difference. Planes +1 tier have huge advantage over their handicapped -1 tier teammates, so are first to catch and kill targets.
The most significant factor in scoring achievement is time - it takes time to gather 14k personal points, or shooting down 15 or 20 planes, or ground targets... Time of the battle is determined by number of caps - 3 caps with low number of points required mean short battle. 5 caps - long and profitable one, with a high chance to get a token.
Surprise surprise - 5 cap battles are rare.
3 caps also provide limited number of targets, as there are less ground targets to attack, and less non player planes to shot down.
Time is also wasted by the size of the map - flying half a minute to contested area after a respawn means losing a considerable amount of battle time, that in case of smaller map would be spent on generating income.
Finally, obvious - time of the battle battle can be set up by bots and their behavior - masters of tactics or headless chickens.
Summing up - tokens are really close to fools gold.