tedster - 4:53 pm on Sep 12, 2010 (gmt 0)
Nuttakorn - yes, those three factors make sense as the main "buckets" - and then there would be detailed factors within those buckets.
indyrank - it's Instant that's new. Suggestions have been with us for a while. Yes, I do know that there are people working to manipulate the Suggestions. I wouldn't say there's any one secret being used to spamming Suggestions - it's more like a combination effort aimed at all three of the buckets.
It's not my way of doing things but, it was an inevitability I guess, given the potential Suggestions have to drive traffic. And that potential has just taken a major jump.