I am working on a website that contains a list of free courses. My aim is to promote our field (semidefinite programming).
Each course consists of a number of articles. Each article is built using different resources (books, posts, talks). Those resources are listed in each article.
I strongly believe that participation could improve the work. For each article, I want to send emails to the professors whose works were used and ask them to give a read the article, check and suggest small improvements if necessary. I will not ask them to write. The participation could be done by mail, github or comments on the website. I will also keep a list of all the participants as a reward to every person who agreed to help (I am trying to find another way to be grateful to participation but).
However, I don't want to feel spammy. Any suggestions on doing that in a good way?
PS: my work is not sponsored by any organization.