I just recently blasted my money site with only 300 high PR forum profiles and then pinged them, my site was slammed way back in the results. So if you're going to money site, only add a few per day.
As far as not doing it to tier 1, is that because we are supposed to be generating manual web 2.0's and those sites don't like profiles going to them? Is it really worth building hubpages / squidoo etc? I would be able to build 100 senuke low quality web 2.0's with the same effort as 5 high quality ones.
Also, I thought google liked you constantly getting more links to your site, so I'm not sure how dripable helps with that, since you're really just making the links in stronger & not making new ones right?