How to make Web 2.0 properties stick? Damn 50% Get removed?

I have around 500 WEB 2.0 Props & whenever i post to them, within a week more than half are removed & the next week another half, finally just 20% is Left.
The reason i wanted to use WEB 2.0 Props is that they give excellent results. But when they get removed, the results start turning bad.

What do you suggest?

--> Register & leave the account for a month & then post?
--> Use content without any links & then update it after sometime?
--> Use Unique/Well spun content?

So, what you do suggest & what's your working method on this to make the Props stick?

- avoid using keyword in domain URL
- make first post that doesn't have backlink (just make it general topic)
- posts should have low number of backlinks (1-3)
- fill in ad much of the bio, create contact and about me page.
- use image/videos
- use well spun readable content

Check out Veheme's pogiboys- this should give you a good idea of how to make web2 that last.