Shemeska
Adventurer
And you use these metaplots in your game? They benefitted games you ran/played in?
To an extent, usually as background things not directly linked in to the major campaign metaplot itself, but often tangential. For instance the Planescape metaplot relating to Rowan Darkwood and the Labyrinth Gem was an 800lb gorilla that kept popping up in the strangest places in my campaign, especially as it related to how those events had impacted Alisohn Nilesia, the once (and future) Factol of the Mercykillers.
Disclaimer to my views on metaplot that seems fair to state:
Keep in mind that I started playing well after a lot of that metaplot had already come out in full, and so it usually featured as backplot to my own slightly advanced timeline of the setting. FR's metaplot -such as you might care to call it that since it has become less metaplot and more sudden and retroactively introduced stuff like Abeir, etc- has introduced the Shades into my use of Toril, and I've worked some tiny bits involving FR's Shades and their return into the backplot of some campaign elements related to Toril. That said, the Spellplague, the death of Halaster, and other more recent cracks in the setting haven't been introduced into my games (even though my current game is set 100-150 years ahead of the "current" Planescape timeline, and so it'd be in line to use those new 4e FR events).
If certain bits of metaplot interest me and they're well written and constructive elements, I'll spin them into the campaign in one form or another, but usually not as part of the major campaign metaplot itself, but as supplemental bits or tangents. If I don't like them (see 4e Spellplague and all its massive changes -and rewrites- to FR's history) I won't use them.