That is a good article. The reason I make my own carts is so I can avoid as many bad things as possible. I know that my rosin is "clean" and I am trusting (mistake?) MassTerpenes to be making a clean product. In light of all of the recent problems it may be more important to know what is actually in it. They state "terpenes and terpinoids".
I think the recent problems are from tainted products. Vaping has been going on for years and all of the sudden these issues have cropped up. I know there are Peeps here that are using BHO and QWISO to do the extraction and no matter how well they winterize and vacuum process it it still contains poisonous contaminants. If they are not vacuuming it they are asking for real troubles.
Finally vaping is probably not good for me but I love the pain relief and the high.