Anything gets rejected
Like others, I put a lot of effort into my last seven nomination (which also clearly meet the criteria). Still, every single nomination gets rejected... sometimes this happens apparently on purpose or for obviously false reasons ("private property" when a quick check on google maps, street view or even the pictures of the surroundings clearly indicate, that the waypoint is in a public park even with no other waypoints around). I suspect that one of the reasons may be, that I live in a big city which generally has a big number of pokestops/ portals already. I have seen suggestions go through that are a hundred times less significant and of much lower quality.
This is effing annyoing! This needs to change.