Re-selling keys is against the rules IIRC. Probably because I can sell my key to ten different people for ten dollars and make a hundred without any of them being able to do anything about it, as keys dont regenerate just because theyve changed hands.
Actually, it's not just against the rules, it's against the ToS.
Scavenged from an old forums post(it may be outdated, the post was from 2009):
This Software Licensing Agreement ("Agreement") is a legal agreement between you and Step 1: Games LLC. ('Step 1: Games'). These are the only terms by which Step 1: Games permits any use of the Software.
Step 1: Games Licensing Agreement for Blockland.
1. The Software.
The Software licensed under this Agreement is the full version of the computer program entitled 'Blockland', which consists of executable files, data files, and documentation.
2. Grant of License.
Step 1: Games grants you the nontransferable, nonexclusive right to use the Software in accordance with the terms of this Agreement.
YOU MAY: (i) load the software into RAM as well as install it on a hard disk or other storage device, and (ii) make one copy for backup purposes.
YOU MAY NOT: modify, translate, disassemble, reverse engineer, or decompile the Software. Any derivative works become property of Step 1: Games.
3. Copyright.
The Software is owned by Step 1: Games and is protected by United States copyright laws and international treaties. Step 1: Games reserves the exclusive copyright and all other rights, title and interest to distribute the Software, and to use Trademarks in connection with them. 'Trademarks' refers to the name of the Software, the Software logo, the name Step 1: Games, and the Step 1: Games logo.
4. NO WARRANTY.
THE SOFTWARE IS PROVIDED "AS-IS". NO WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, ARE MADE AS TO IT OR ANY MEDIUM IT MAY BE ON. Step 1: Games WILL PROVIDE NO REMEDY FOR INDIRECT, CONSEQUENTIAL, PUNITIVE OR INCIDENTAL DAMAGES ARISING FROM IT, INCLUDING SUCH FROM NEGLIGENCE, STRICT LIABILITY, OR BREACH OF WARRANTY OR CONTRACT, EVEN AFTER NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
5. Term.
The term of this license grant is perpetual. You may terminate this Agreement at any time by destroying all copies of the Software in your possession. Your license to use the Software will automatically terminate if you breach the terms of this Agreement.
6. General Provisions.
This Agreement is the sole and entire Agreement relating to the Software, and supercedes all prior understandings, agreements, and documentation relating to the Software. If any provision in this Agreement is held by a court of competent jurisdiction to be invalid, void, or unenforceable, the remaining provisions will continue in full force without being impaired or invalidated in any way. This Agreement will be governed by the laws of the State of Oregon, without regard for its conflict of laws principles. With respect to every matter arising under this Agreement, you consent to the exclusive jurisdiction and venue of the state and federal courts sitting in Lane County, Oregon. This Agreement does not create any agency or partner relationship. Your rights under this Agreement are personal and do not include any right to sublicense the Software. Step 1: Games reserves the right to ban you from playing Blockland online at any time for any reason and without notice.
I believe by nontransferable it means that you can't resell or re-distribute the software or a key. I may be wrong, however.
