Until recently I was able to find all my public comments using a link on my profile page. I was using this functionality to keep track of all issues where I have commented, but not contributed anything. It was under a section called "Public Activity".
This function seems to have been removed. I can not find anything about it on the help page about profiles.
Does anybody have any information on when and why this was removed?
You can do this with an advanced search query. In the top nav search field, enter is:issue commenter:username. This will return a list of all issues and pull requests where the user has commented. You can then click on each issue or pull request to view the individual comments.
To search within a specific repository: repo-name commenter:username.
To view your own latest comments across GitHub, use:
is:issue commenter:@me