Affinity

Affinity is the experience gained from killing mobs, hacking, etc.

Affinity acqusition can be boosting by using the " Affinity Amp" Artifact purchasable for 40plat, or randomly rewarded from alerts.

Distribution Mechanic (?)
How is affinity assiged to each slot (warframe, main weapon, etc) is it by inflicting damage / landing a killing blow?

Bonus (?)
At the end of missions bonus affinity will be rewarded for (?)