Not necessarily . With unlimited devices , a large portion of your farm likely sits idle waiting for ads . If they limit it to 10 devices and are able to maintain the same amount of ad inventory , your earnings might actually increase . Why ? 10 phones getting ads 100 % of the times is much better than 20 phones getting ads only 50 % of the time . You can redeploy your other 10 devices to other apps or phase them out entirely . Less devices running on a network cuts down on load times , congestion , interference etc . Also , going back to 10 devices ensures a much more equitable distribution of ads . There are a few large scale farmers here with 50 phones , likely all automated . Limiting it to 10 ensures that they don ' t consume a day ' s ad allocation before the rest of us have a chance to earn . 10 phones keeps everyone on an equal footing . Finally , the promotion is bound to end in January anyway . The coming ad drought is really going to hit YooLotto harder than most .