1. You need to wait 4 hours between your requests.
2. 5 friends can answer your request of 1 item.
3. You can send 100 items per day.
4. You can receive not more than 150 items per day (except presents).
5. The lifetime of one request is 12 hours.
6. The number of a unique item you can ask for per day is 40.
7. The number of requests you can make for the first time after daily limit's reset is 4. The limits reset at 9:00 pm UTC.