Does Apple make money out of its Worldwide Developer Conferences (WWDC)? 

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I know it seems expensive, but consider Apple’s costs. Rent Moscone center for a week. The actual show is 5 days, but it takes additional days to set up and tear down. Pay union wages for electricians, movers, security, food service workers, video crews, etc. Rent stages, video, lighting, commercial grade WiFi, and technicians to install and run it. Provide 6000 meals a day (5000 developers plus Apple employees), plus snacks and amenities. Choreograph a party with a band, food and drinks, additional stage, lighting, sound and security, at another venue.

Ex-Apple employee David Shayer answers on QuoraI wouldn’t be surprised if they actually make a loss on the whole week and the ticket cost is used to ensure only committed developers attend.

Dropbox to show all your cloud files without downloading them 

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Project Infinite will enable users to seamlessly and securely access all their Dropbox files from the desktop, regardless of how much space they have available on their hard drives. Everything in the company’s Dropbox that you’re given access to, whether it’s stored locally or in the cloud, will show up in Dropbox on your desktop. If it’s synced locally, you’ll see the familiar green checkmark, while everything else will have a new cloud icon.

Dropbox announces Project Infinite, where all your dropbox files show up in the file system but you don’t have to have the whole files downloaded. It then fetches them on-demand. 

Currently if you’ve more files in your dropbox than storage space you have to use selective sync to prevent them from filling it up.

It’s exactly like BitTorrent Sync’s pro feature. Here it is in action to give you an idea how Project Infinite may work:

BitTorrent Sync