Participant Becoming A Researcher

As a participant, I'm considering conducting a study.

I'm considering investing $100 to conduct a study with 100 participants, each paid $1, to determine why so many posts and comments are downvoted here, and share the results with you. Here are my criteria:

I'll be your most favorite researcher...

• I don't care about your zip code.
• I don't care who you voted for.
• I don't care if you swim across the Atlantic Ocean every day to get to work, eat rocks for breakfast, attend your own funeral, or survived a fatal heart attack.

All I want to know is why people downvote a simple "thank you" comment.