This is very interesting. More research should be done. It may be the case that for high-profile games - which are almost guaranteed to sell well - demos are no

This is very interesting. More research should be done. It may be the case that for high-profile games - which are almost guaranteed to sell well - demos are not needed. And the article also states that marketing budgets are not taken into account in the research. High-profile games are marketed more widely, and don't need demos, leading to the result that games without demos sell better.