There were various fiction contests in May 2018. Some were focused on specific genres like romance or mystery, while others were open to all types of fiction.
Martha Kent is Clark Kent's (Superman's) adoptive mother, known for her love and support. Martha Wayne was Bruce Wayne's (Batman's) mother, tragically killed in an alley, which shaped Bruce's path. Their stories are different but both have significant influence on their sons' lives.
The number of people submitting fiction to magazine contests can fluctuate a lot. It depends on factors like the genre of the contest, the prize offered, and how well it's promoted.
I'm not sure specifically which 'Glenn Stewart' in the realm of science fiction. There could be many individuals with this name. It might be an author, a character creator, or perhaps an actor in science - fiction related works. Without more context, it's difficult to be more precise.
I don't know if the Karen Stewart NSA story is true. It could be a rumor or based on some partial facts that have been misinterpreted. We need more accurate and comprehensive information to make a judgment.