... only posted 1 url/day...
I hope you do understand how annoying that can be to a site owner, and users of a forum though. It might seem like nothing much to you, but then multiply it by thousands of people doing the same thing. Just think about it.
Had you just put your link on your profile page, and then posted one twitter type message a day like "hi everyone, just getting ready to head out to the store", or "darn I'm so bored right now, I'm doing my wash and just kicking it on the couch in just my panties, hehehe", or "I can't believe the prime minister is doing blah,blah", none of the real users would think anything of it. You might have actually even started getting more followers.
When the method was posted it was really simple instructions,
1 - open an account and fill out the profile info, make it look real and DON'T ADD YOUR LINK YET, leave the homepage blank. (this made you seem legit)
2 - add all the subscriptions and groups listed
(this connected you to high pr backlinks)
3 - just post a message saying hi, don't put a link in the message.
(this connected your profile page to the main page)
4 - then after doing steps 2 and 3 ADD YOUR LINK TO THE HOMEPAGE in your profile info. (this finished getting you the high pr backlink)
There was no twist needed, no reason to spam anything. The result of following the method was an increase in your pr. How could it possibly have seemed like a good idea to risk killing such a simple and powerful way of raising your pr, just to get a site indexed fast by spamming it.
Before jumping on a method and trying to give it a twist, it is best for people to understand the method first.