1.- Use this link to Sign Up (Click Here)
2.- Activate your account by adding a valid payment method credit card or Paypal. (you will not pay anything)
3.- Done! Now you have free $100 credit For 60 Days.
With $100 free credits you can build as many apps or servers you want.
You must use those credits in 60 days from the day you registered with the above link, after 60 days the credits will expire.