I'm sorry Michael, this is all bad news. The introductory video emphasizes multiple IP addresses, spinning pieces, etc. Keep in mind that the vast majority of social backlinks are not dofollow. I think it's one of those each time there is a new service they provide dofollow while they are gaining steam but eventually cut that off.

The price is what $7? For 750 backlinks a month? That's a huge no-no.

If you are looking for a legitimate service to help with your social bookmarking I suggest OnlyWire. That service is a bit more expensive, will require you to create legitimate social media profiles for all your feeds and if you are smart...you should check in with those profiles once a month or so just to keep up appearances.

Backlinks beyond the low hanging fruit like directories and comments are difficult to get. That's why places that sell "quality" backlinks are scams.

Let me clarify - this is a black hat service. No doubt. Unless you have the knowledge to keep up with black hat maneuvers I would avoid this service.

Right, it does cost something... and, if you are active on SEOmoz you are probably more advanced than the SEO training they provide. On the other hand, they pretty much spoon feed great link juice to your content.

It's one of those "digital sharecropping" issues but if you plan accordingly you can leverage their sites high authority to get your posts ranked well on Google (your posts that are hosted on their site) that have links back to your main url.

The good -

If you are doing the writing, you obviously can choose the best anchor texts

Since you are doing the writing, you still get the reputation bonus of your content

It's much easier to rank with them as opposed to yourself when you are starting out because they have so much authority

The bad -

Your building their empire, not yours (unless you leverage it correctly)

And... I'm off on a tangent. Sorry

1. Agree wholeheartedly with Stevej24 about the one link. Unless there is an option for a social link or something. The best answer to this is to see what other posts are doing. Remember that each website is its own community so to get the best traction comment wise or with guest posting is to see what's already there and mold yourself

3. Again, this depends on the community of the site. For example, a small site with a strong following might be a PR1 but you'll find tons of quality traffic. Whereas a PR 5 or a huge DA site might just send you spammers. In general, a thoughtful mix is always wise.

4. The only negative I've had is a lack of response, which is pretty common if you submit to huge sites. Be sure to read everything you can about guest posting on a site. For example, hbr.org tells you flat out not to expect a response before 4 weeks. If you have a time sensitive post (which you should) you are better off going to a site that is going to welcome you with open arms

BTW, as a real estate person are you interacting on ActiveRain? We write for real estate and have only heard great things about that community. I keep trying to get us on there for interaction but it is too far down my to do list