> If you're confused about who to contact to follow up on the ideas of a particular paper then write to the first author, or whichever author is listed as the contact person.

That just goes to show how much you understand the topic. The leading author is usually the institutional leader, and in paper mills it's frequently the guy who stands to benefit the most from the scam. Not the guy who actually did the work.

So now that you missed that one option, what's your plan? To walkt through the hundred names in the list?