Islands has quite a few limits on many of the blocks and placeable items. Like hoppers, Item frames, and beacons to name a few. The islands server is suppose to be a more difficult version of skyblocks, so having limitations is only reasonable, but if you compare the top ten islands on skyblocks to the top ten on Islands you can see the size of spawner grinders among other things are smaller scaled on Islands compared to Skyblock. (Keep in mind Islands has been out for less time, than Skyblock.) I believe this to be because of the hopper limit. With less hoppers you can only create so many spawner grinders before you reach the limit and then can't exceed any further. I believe having to buy the hoppers from the shop is already a challenge since they are not craftable, along with having to buy the spawners which can be expensive. In Beta the limit was increased to 1000 at one point, but now it's 500. We definitely need an increase if we wish to further our islands. I don't know how to check limits, but I know beacons and item frames at one point did have a limit. Pointless limits like these should be removed. Overall I think increasing and removing limits would only benefit the server and possibly bring in more players.