Retail sales figures are somewhat irrelevant for an MMO. It does mean SOMETHING, as the money S-E is getting for the box and disc surely helps cover some of their costs. But a much more meaningful number would be how many active subscribers they have after 1/3/6/12 months.
Sales figures don't necessarily mean the same for an MMO compared to a traditional game either. Whereas other games have a set cost of how much it took to develop, market, and get to stores, MMOs have huge operating costs with maintaining servers, continuous development, planning for future capacity, etc. So if selling 1,000,000 copies @ $60 each of a game might be a success for a standard game with similar initial development costs, that's not necessarily the case for a large scale MMO that's anticipated to provide a certain revenue stream over time.
Also, XIV is skewed a bit by the buddy passes packed in. I bought one CE box, which resulted in two active players after using the buddy pass to sign up my wife.
Anza: Titan 2004-2011 / Capuchin: Phoenix 2011-???