I don't think they are meant to be parodies. Parodies poke comedic fun at the originals. These are meant to confuse someone into buying the wrong version of a popular film. That's why they make sure the names and even the covers look as identical as they can without getting sued.
The term for these is "mockbusters", and the term has its very own Wikipedia article, linked in the first paragraph of the page you cited:
https://en.wikipedia.org/wiki/Mockbuster
Parody films do not compete with the actual films they are parodying. It's not a good comparison.
I don't think they are meant to be parodies. Parodies poke comedic fun at the originals. These are meant to confuse someone into buying the wrong version of a popular film. That's why they make sure the names and even the covers look as identical as they can without getting sued.