These are usually anti-spyware or security software applications that use various forms of deception and/or unethical means or show a history of negligent false positives to goad the end user to make a purchase.
In some cases these applications maybe downloaded with some form of unwanted software at which point the rogue application is offered to the customer as a way to remove the unwanted software.
Spywarestrike is a rogue antispyware that acts with the other rogue antispyware program called Spyaxe. This program shows a message, which normally says that the compromised computer is infected with dangerous spyware parasites (that it has actually installed) and asks the user to download and install an anti-malware program, which actually is SpywareStrike. This rogue antispyware automatically starts up at every boot process.