I agree. The author(s) use the word ‘memos’ as a proper noun (e.g. We are memos), but the use of ‘memo hub’ is descriptive (e.g. this is a memo hub). Thankfully

I agree. The author(s) use the word ‘memos’ as a proper noun (e.g. We are memos), but the use of ‘memo hub’ is descriptive (e.g. this is a memo hub). Thankfully, the power of HN community can explain, where the authors are too shy to say.