Not so. If you make a declaration with a fate point there's no reason why you would not get to tag it.
What about Declarations created via fate points? No rolling necessary. (Ninjaed by sinker )
You've already paid a fate point so I wouldn't characterize that as 'free'. You are correct in noting an additional fate point isn't needed for the tag. My point was that you don't get a free tag on an aspect you've guessed correctly and you do on an assessment even though the aspect was pre-existing.
Oh, it may also be worth pointing out that you can pass those free tags on to friends and allies.
Sure, I see what you mean, but we could also say that since one invoke gives a flat bonus and the other gives a reroll, Then we should have different terms for them as well? Silly, I know.
My point is, invokes and invokes for effect both give benefits to the character initiating them. Plus, any time a situation allows you to invoke, you can likewise invoke for effect. So, why make the distinction, if it only causes confusion?
You can, of course, rewrite whatever terminology you want for personal use. However, unique definitions / uses may make communication difficult.
More to the specific point, compels (and invokes for effect) are not always for the initiating individual's immediate benefit. Often they're used to limit choices or add a complication. Take the aspect everyone loves to hate as an example: "
The Building is on Fire!" doesn't really benefit anyone when compelled. But it may force people to evacuate, destroy property, set off spinklers, start a countdown for when the fire department arrives, or a number of other potential narrative effects. Contrast that with simply invoking the same aspect. It'd give you a +2 to your attack (or other) roll because of the distraction provided or it will allow you to re-roll a stealth (or other) roll as you use the smoke and flames.
Invoking is directly beneficial to a single roll. Compelling / invoking for effect is directed at the narrative, not a roll.