Sigh good sales and good quality have nothing to do with each other. Especially for first-day sales they are completely irrelevant.
Spiderman3 and Indiana Jones 4 have been watched by millions and millions of people. That doesn't make them good movies.
They are still simply shitty movies with big names.
The same applies for music (American Idol anyone) and games (Carnival games multi-million seller)
Get over it.