I won't comment about the merits of AMP, just something that bugged me about the first paragraph. The author questions if a project is open source due to their

I won't comment about the merits of AMP, just something that bugged me about the first paragraph. The author questions if a project is open source due to their authors and main contributors, which seems very odd. A license is a license is a license, don't confuse it with external issues.