> I might catch some flak for saying this, but as a marketer this is a pretty significant change and will make running campaigns more difficult.
Excellent.
> Also, I don’t really see how this does much to protect anyone’s privacy, this mostly just makes running effective campaigns more complicated and expensive.
If you don't have access to data you shouldn't have access to that improves privacy. Exchanges leaking data which then gets cached is a huge privacy issue, allowing third parties to link up this data with data they already have is absolutely terrible. Data files in isolation are bad enough, allowing the joining of disjoint datasets is about as bad as it gets when it comes do de-anonymizing people.
> The data is still being collected and sold, now you can’t just get it directly through Facebook anymore.
Good. Not all data will still be available, and hopefully some more of these holes will be closed soon to make it even harder to make running highly targeted campaigns more difficult.
From where I'm sitting the sooner marketeers lose the capability to run targeted campaigns the better, and every little bit helps.
On the plus side: your budgets will go up to reach the same effect so why complain?