i have noticed a lot of posts, especially the first few in a thread, have words that are double underlined and when the cursor is placed and hovered over the word a pop-up screen is displayed. the most recent "link" has been for part-time work at $98 an hour. i unintentionally clicked the link and got an annoying screen which gave me a prompt after i tried to leave if i really wanted to leave. how do these advertisement links get inserted? what is next, advertisements to make something bigger or work better?