Depending on your server, this is not true at all. I made about 1.5 million last week on them. Granted that's an extreme amount since I had built up a good amount of radioactive paste inventory, but still, saying "don't bother" isn't always the rule. I make a lot of profit on them.
you may have made 1.5 million but probably could have made 1.4 - 1.6 mil by selling the mats