They remain popular. A lot of readers enjoy the escapism they offer. They can get lost in the simple, often idealized love stories. Even though the characters and plots may not be very complex, it gives them a break from reality and allows them to daydream about a different kind of love life.
Yes, they are still popular. Some people like them because they are easy reads. After a long day at work or study, they just want to relax with something that doesn't require much mental effort. It's like a guilty pleasure for many.
Despite their flaws, trash romance novels have a certain following. People are drawn to the simplicity and familiarity of the formula. The basic love story with some drama and a happy ending is something that many find comforting. Also, they are often inexpensive and widely available, which makes them accessible to a large number of readers.