I thought the book said since their was no FP given there is none earned.
You don't spend a FP to tag an aspect that you caused someone to have huh?
Or am I confusing things...*digs through the book*
This is hard to deduce in the book, as it is not explicitly said in any one place, but this rule clarification was established (with great pain) in a thread, with Fred Hicks eventually weighing in and explaining why it works this way.
In short: the person who lands/discovers/establishes an Aspect *always* gets to get a free "tag" to Invoke that Aspect.
That Invoke can be for a re-roll, a +2, or an Invoke for Effect.
Here's where it gets tricky:
If that Invoke for Effect benefits the player, it happens as the GM adjudicates.
If that Invoke for Effect constrains/complicates/restricts an opponent, then it becomes a Compel, at which point the GM takes over Compelling it; the original player didn't have to pay a Fate Point for it.
Then, the GM negotiates the Compel with the target (usually an NPC) per usual. The target may buy off the Compel with a Fate Point, if available, and if so, the player does *not* receive it.
This is, indeed, confusing. WillH is, at least so far, correct on all counts - but the ruling he's working off of is one that was posted to the forums by the game designers, rather than something that can be directly supported by the text in the book. Alas, my search-fu is weak, and I cannot provide a link.
I was the originator of the thread, but I can't find the link, either.