I think he means: does leaving it in a slot for a longer period of time result in bigger drafts?
And the answer is ... not from my experience. First off, assume you're talking about Draft Boost, this bad boy:
I equip it before drafting and it gets me good bonuses, and oddly the only impact I've seen on whether it's equipped or not is:
1) Usually, when equipped, regardless of how long it's been equipped for, the draft is higher than expected.
2) Usually, when not equipped, regardless of how long it's been unequipped for, the draft is what is expected.
3) However ... there are oddities, such as I'm expecting a normal sized draft, can't be bothered to equip the artifact, but then it's a huge draft.
4) Another oddity: sometimes I'm expecting a huge draft, equip the artifact, and get a totally normally sized draft with bonus, ie: aligned with #1 above. Even odder is that sometimes after one of things, 6 mins later on the next draft, I get a #3 (b/c I'm expecting a small draft and can't be bothered to equip the artifact and just click it, but then it's a big one). Can't explain it. Because you can never go back and equip/unequip the draft you just had to compare, and you never truly know all the factors that led to the draft size. But these oddities are only about 5% of the time. 95% of the time it acts as expected as per #1 and #2.