Is there any limitations or requirements for the length of Guest Posting?

Or is it just a made up thing by the webmasters?

I am thinking about buying micro niche sites and putting affiliate products in them.

Is this a good idea to do? As I am looking for them where are the places I can buy them?

Hlo Friends,
Can anyone tell me, What is meant by the flux in seo?

When it come to link building guest blogging is considered as the best. But what are the alternatives of it?

Does Guest Posting really helps to build Authority in any niche? Or, just just people do it only for link building purposes.

Which is the best CPM network for small advertisers?

How to do effectively marketing with Twitter? And what are the best tools to do it with?

Does Mass answering sites like Quora really helps in Marketing?

1) Social Media Engagement-
Facebook, Twitter, Linkedin, pinterest, Google +

2) Social Bookmarking Sites-
Diigo, Stumbleupon, Delicious, my.bookmax etc

3) Image Sharing Sites-
Weheartit,visual.ly, Deviantart, Flickr etc

4) Blog Submission-
Tumblr, Weebly, blogspot, Wordpress,Livejournal

5) Directory Submission

6) Question Answering Sites-
Quora, Flexa, Askville, blurtit,ehow


7) Video Submission-
Youtube, dailymotion, vimeno, hulu, break, metacafe

8) Infographic Submission-
Visual, reddit, submitinfographics, nerdgraph, infographiclove

9) Document Sharing
Issuu, slideshare, scribd, calameo, yudu

10) Forum submission
Flickr, addthis, bbpress, careerbuilder, affiliatefix

Hello guys,
I'm working for an agency of Google and FB. We have one special service that for rent ad account.
As we seems very much clients rent and running cloaking campaign about affiliate (skin care, nutra,diet,...) and new is dropshipping.
So if you are running on this way and the account was banned by GG or FB, may be you can pm me, we can creat an new premium ad account for you can continue the games.
Hope this can help smth, PM me on skype: johnnydeep0211 if you want more details.
Tks and Cheer