Talk:Wonder Challenge/@comment-175.137.38.250-20120421044939/@comment-5030856-20120421065533

TinyCo put a restriction on the maximum number of these items that a player may build. I had built 4 temple workshops to speed up my progress through the challenge, but now that building is no longer listed for me to buy, since I already own at least one. When TinyCo places a restriction on an item, those players that already own more than that new maximum number are able to retain them.