I've learnt one thing overtime in this game anytime something comes from ma... What ever you think it is or assume... The answer will always be the opposite.
It does say "Increase Skill gain" and on description page "Increases all skill gain for 1 hour after consumed"
From the daily token trader you can buy skill pills that increase skill gain from 10-100%
You get more skill per gain with them. Also, the skill gain is stackable with other skill gains. I have hunted with over a 302% skill gain on laser weapons + 50% all skill gain going at the same time and the effect was noticeable.