I was wrong about one thing - PACs could legally raise soft money prior to 2002 - but they couldn''t spend it to directly benefit one federal candidate. PAC soft money expenditures could indirectly benefit candidates through issue advocacy spending and the like - you couldn't use it to advertise FOR a candidate, but you could use it to advertise issues RELATED to a candidate.Wrong, unless you think there aren't any PAC's that work exclusively for a single candidate.
I think you have a different definition of "soft money" then I do. Contributions to PAC's are also a form of soft money.
That's just one form of soft money, however; the other major type is money that goes to the national parties and is distributed among various campaigns across the country. Again, soft money could not be used to directly benefit federal candidates; state parties had to do some pretty elaborate bookkeeping in order to show that they weren't using soft money for this purpose.
The driving force behind campaign advertising tends to be individual contributions, actually.PAC's still exist don't they? They are still the driving force behind campaign advertising. If they are illegal then there are a lot of people breaking the law...
PACs do still exist, but they are no longer allowed to take soft money, only hard money. Hard money is subject to all the federal regulations and laws on the books, and it can be used to directly benefit a single candidate. All soft money (with a few exceptions, I'm sure) became illegal in 2002.