I am quite surprised to find that a lecture slide for a course has 133 citations from highly reputable researchers across the world. The main contribution of the lecture slides (which seems to be the reason for the citations) appears in 1 line on 1 page of the slide out of 30 slides. (Citation count according to Google Scholar)
Another set of random course notes from lecture 12 of a course just happens to have over 100 citations, Reinforcement Learning and Control - CS229
This 8 page course note has 200 citations, which is more than many of actual research papers
Also, another summary of a blog post (less than 14 pages) has over 700 citations (From the paper: This paper originally appeared as a blog post on 19 January 2016.)
Citation count from Google Scholar. This paper isn't even published anywhere aside from Arxiv.
What is the point of even publishing a paper and going through the painstaking process of peer review and editing if you can just write some blog post or a lecture slide on some hot topic and accumulate citation counts (which is crucial for securing funding, etc.)?