That's not the real Crackulous developer. Crackulous is free and open source. This message is from their forums:
The quick and dirty: Crackulous was developed right here on our forum, on our SVN server. Anyone selling Crackulous or claiming to be the developer is trying to scam you. The official Cydia repository to get Crackulous is http://cydia.hackulo.us. Crackulous is and will always be FREE SOFTWARE. It has had NO OTHER developers but SaladFork and Angel, with contributions from Uncon