I am cautious about this whole arrangement, but that's more an issue with IGN than Humble Bundle: The store is still just selling games. IGN now has a motivation to slant things in favor of their sales, which makes them less trustworthy. But as long as Humble Bundle is still selling games, it's fine.

But I always worry with a big acquisition that they might change parts of the platform I like, and so that's my biggest concern.

Does IGN review books now? I genuinely don't see any conflict here.