I do not think you can make the comparison. The article is about a science paper, and you are talking about the company Whatsapp. Facebook had already explained

I do not think you can make the comparison. The article is about a science paper, and you are talking about the company Whatsapp. Facebook had already explained why they bought it at this cost. The kind of Titanium here (Ti6Alv4V) does not seem to be that good, so "it seems" we should not be too optimistic here (but I'm just a developer, correct me if I'm wrong).