I've come across a weird issue. I posted 20 articles in one day for a bunch of easy keywords on a well established site that sees around 40k pages views a month. However, none of the newly published articles are ranking for anything, despite them all being naturally indexed. Before anyone asks, I know the keywords are easy, I'm not relying on tools to tell me this, I've done manual competitor analysis and there are very few if any competitors addressing the keywords in the post titles. It's the same method I used to get to 40k page views. My question is, is there some sort of filter with google if too many posts are added in one go? It seems to be very strange.