Spamming in comments!

I joined this community today and I'm in love with the concept but I don't understand why people keep commenting off-topic in posts. Can they earn money by just commenting/spamming? Most of them have negative reputation(number in parenthesis next to their name) and doing what they do will earn them even more of that! Whats the point then?

These are the kind of thoughts I get when I see something unusual. BTW, I'm very new here so I might sound ignorant to most of the experienced users(Forgive me for that).

Forgave already? Good!

Lets talk about me. I'm a student, an ex bitcoin miner and occasionally a photographer.

Yes, you read that right, a PHOTOGRAPHER!

Occasionally, I take photos of building cracks that look like this:

Original photo

Now, the real question.

Would you have considered it an introductory post, had there been no tags in it?

P. S. - I would love to hear your thoughts about this post and you're welcome to answer any/all of my questions. I love to hear what people think(in general and about me). I look forward to a healthy discussion here!