IvyBackup comes in three editions: Home, Standard, and Professional. Based on the regular price of $19.95 shown on SoS, that would mean this is the Home edition being offered.
The description states: “IvyBackup creates full and smart backups (differential and incremental)” but the Home edition does not have either differential or incremental backup capability.
Your previous giveaway offers were done the same way. Several people commented about the bait and switch advertising. Looks like you are still listing features of the Professional edition but offering only the Home edition. Please be honest in what is being offered.