Adshrink (1)

Adshrink (2)

Adshrink (3)

Adshrink (4)

Adshrink (5)

Adshrink (6)

The Adshrink.it shortener was added, the reason is because it pays twice as much as Ouo.io.
It’s also easier to use than Ouo.io, although I know some people prefer Ouo.io because it doesn’t have AntiAdblock and they have trouble turning it off when using Adshrink.it . I will keep both shorteners, although if you want to contribute more I would prefer that you download the Adshrink.it shortener.
Both shorteners count only up to 2 IP visits per day. So the most optimal for me would be if you download many Sets:

2 Adshrink.it + 2 Ouo.io + ∞ any option