Marvel is getting ready to offer over 700 #1 issues again just weeks after it had to halt the giveaway after demand crashed Comixology's servers. To avoid a server overload this time around, Marvel is offering the downloads to users in batches. To get your free 700 #1 issues, follow these steps:
2. Starting on April 11th keep an eye out for your invitation.
3. Once you get your invite be ready to download... a lot.
Do note that as of the time of this writing, both Marvel's and Comixology's registration pages seem to be overloaded, but keep trying back and you should get through.