... If you have already purchased and received one of these 'free-trial' offers, return it immediately! The trial period typically starts when they ship the product not when you receive it, so you don't have much time to act once it's in your hands. ...
Edit Note: To anyone wishing to reply to this post and share their experiences, that will be helpful to others as well. However, please refrain from calling out any company by name. I would hate to see this much needed information have to be taken down due to posts that break any forum rules. I think just mentioning a company as a "free-trial supplier" is enough to cover all such companies. There are many of these companies out there now, and some even seem to change their name on a regular basis. The one that advertises on my local radio station has altered their name twice in the last 6-8 months, yet have the exact same script in their commercial (with just the name changed).
My wife and I got the free try set. A year layer they still will not stop charging we had to get new cards.
Had a friend of mine get caught with this type of thing. The kit cost $189 and a pack of cartridges cost $69. OMG!!! I can get a kit for $49 or less and cartos for $10.50. I told him about this forum and told him to start reading (and to keep vaping).