MacSweeper (the fraudware) versus Mac Sweeper
Look closely, the former - MacSweeper (one word) is the fraudware all over the popular press.
"Mac Sweeper" (two words), on the other hand, has been around for a few years now and as far as I know is unrelated to the "MacSweeper" fraudware.
I am already seeing some confusion about the two products - probably because a search for "MacSweeper" will bring up hits for *both* products, with "Mac Sweeper" invariably appearing on the first page of hits.
Personally, if I were the owner of "Mac Sweeper", and that product is not the same product as "MacSweeper", I'd investigate whether this situation qualifies for and would justify the issue a DMCA Takedown Notice.