Not everyone is eligible for the Windows 10?

As the Windows 10 has set to be launched on 29 of June this year, many daily Windows user have anticipated the birth of the new version of the Windows. However, Microsoft starting to twists its words by announcing that only certain people is eligible to receive the upgrade.

Turns out, the Windows 10 is only made open to Windows Insider beta tester – those who have registered themselves and participated the beta testing for the Windows 10.  The Windows 10 educational edition and Enterprise will only made available on the 1st of August.

It seems like Microsoft keep changing their plan in their previous promises on making Windows 10 free for everyone? What’s the motive behind?