Also, this is the key:
Victor Sullivan wrote:To put it in simplest terms: There is no stamp for the Melting Pot.
Correct, Drafting room does not require a stamp. The reason for this is that the requirements for drafting room are simple and absolute: you need to have a working draft. That's an easy requirement, a thread either has a working draft or doesn't. Requirements for the later forums are more complex and require individual assessment by cartographers.