I explained adzbuzz more here: https://steemit.com/narrative/@sames/calling-all-narrative-users-there-is-another-service-like-it-called-adzbuzz
In one way you don't have to buy power in adzbuzz to earn. The more ads credit you have the more ad space you control. The social earning part of adzbuzz is like Narrative the more people active in your community the more you earn. You can also have your own blog and earn like a community with your content. Any question just ask me :)