The % of bot users is not critical to revenue, no.

Advertising buyers determine how much ad views are worth to them in their own way. This demand essentially sets the price since there is no marginal cost of providing advertising views.

For example, suppose that you show 1,000 ads and get 2 people buying something from your store. It doesn't really matter whether 1,000 people saw your ad, or 500 humans and 500 bots saw it. The important statistic is what revenue you got from it.