Before anyone get all excited about this 'MEGA' resurrection.
Go back to basic and read their TERM OF SERVICE and PRIVACY POLICY.
Specifically regarding how they may use your personal database that you provided consciously via filling their subscription form, and the info they took through the cookies embedded in your computer, including your IP and how they may go about with the files you uploaded using their service, not to mention consequences and implications caused thereinafter.
Once you read through properly and thoroughly, you'll say "OH! SHIT!"