The letter collector event has been revised.
1) New items were added (you can find an up to date list above)
2) The chances to get an item have been increased
3) The system itself has been revised. It is now possible to get multiple items (depending on the chance) from a word!
Before: Each word gave you 1 item. While calculating the chances, obviously the item with the highest chance came first. Therefore the chance was low to get items with lower chances.
New: As before, each item has its own chance. However, the calculation if you get rewarded with an item is done for each item in the reward list. Meaning that you could
theoretically be rewarded with every item with 1 word.