And don't think what google did was that innovative. As other articles linked in these comments show, this methodology is used by at least a half dozen other ad firms. The fact that form submissions get around the 3rd party blocking rules is something that was discussed in webkits bug tracking system in 2010 and is publicly available. Apple employees even commented on the policy and seemed to be ok with the "weak third-party blocking" implementation. So lets not blow things out of proportion and contend that only multi-billion dollar companies could have figured it out.
As I said, I don't agree with what Google was doing, I just fail to see how Apple isn't at fault here also.