The button to double my income with ads is not available anymore!
Last Updated: 209d
If you have unlocked some of the special characters that gives you a permanent revenue improvemnet, like the Accountat, this option disappears.
It is not possible to watch ads to double the income, since there is already a permanent income upgrde in place.
If you unlock both the Accountant and the Finance Expert, they both improve the revenue by 150 %.