what if diamonds just gots reduced every day and you cant quit the buying, what if you so longly in it that you dont even know where this expansions are, to know what building to remove because you just moved on in chapters and placed next to it the unlocked ones? i mean you sure, wants it to solve temporary troubles, but if you has one plus expansion you not get ride of it as it solved you will use it. then comes the next temporaly trouble and you not even remembers the last time you didnt gives back the expansion either. The idea not that bad but kind of reminds me of the... of i begined the 9 hour factory work with all my workshops, now i need a button to make them undo it so i can begin 5 min. If you would be in situation to made 9 hour work with 120 factory and not wants to quit the work but click stop all factory button accidentally to be cancelled, you would be quite angry, so that better not come into game either.