So, we first get a new mine/collector level.. then when people start the upgrades, a gem boost for elixir collectors.. which means many people would have spent gems to quickly finish upgrades to avoid missing on the boost. Some would have cancelled their upgrades and would have started focusing on gold mines. And now, BAM! we have boosts for those as well. Either miss out on those or spend more gems to finish the upgrades. Well played Supercell, very clever.

