It won't appear because of your low rank. It's not about the link. The link is correct. It's just that newbies cannot yet post images. But somebody has already quoted your post. The image is already visible. You can scroll up and see it's already there.

As to the spam transactions, let them all come and waste their money on fees. Let's see if they will sustain such useless attack. As I have observed, transactions fees have already lowered down a lot.