You would have heard of or seen Lumosity, you know the one that claims to train the brain. Designed by neuroscientists and proven scientifically to help prevent Alzheimer's, not to mention improve congnitive performance in it's users.
Lumosity is basically a bunch of games that claim to "train the brain".
They were promoting a series of ads that made claims that actually weren't proven/backed by science. So they have been removed and Lumosity now must pay a fine for misleading customers.
Lumosity are now banned from making such claims.