Getting Many Links from Tumbler Question?

[KevinBarnes]

If I have 10 links coming from 10 Tumbler blogs.. Do they count as 10 linking domains or 1 linking domain coming from tumbler.com?

Does the authority of links coming from tumbler decrease the more I get links from tumbler blogs?

Thanks

[JulianneStaino]

HI Kevin,

The 10 links count as 1 linking root domain.

However, Google's algorithm recognizes that the sub domains on tumblr are separate accounts, which will actually increase the authority to your site.*

*But not as much as 10 links from different root domains.