Too many activations error
SCD will allow you to use your donation details on two different user accounts. If you would need more than this, or you have bought a new mac (congratulations!), then send me a mail to email@example.com.
Here is a sample mail for you:
Hello Sean, I get the 'Too many activations' error in SCD when trying to register on my new MacBook. This is my donation email address: ...@... Thanks, XYZ