First Data Drop use: What does "Expires On: _date_ mean?

Hello, I created a data bin and the response email said:

Expires On: Tuesday 22 December 2015

But I also emailed another Wolfram user who said that he has been using datadrop for many months WITHOUT any expiration or loss of data. What does the databin message mean that I received? A databin that expires in a month is not very useful. Thanks.

Please visit this page for explanation:

https://datadrop.wolframcloud.com/plans.html