Having multiple urls that go to the same place will get you penalized for duplicate content in a heartbeat.
They should actually specific a canonical url for each specific line-number url.
So, I don't think it's a "growth hack"--I think it's an oversight that may cost them.
Having multiple urls that go to the same place will get you penalized for duplicate content in a heartbeat.
They should actually specific a canonical url for each specific line-number url.
So, I don't think it's a "growth hack"--I think it's an oversight that may cost them.