There was a time when there was a “operational link "between the media (press, televisione, etc..) and the operators of the savings market and investment (banks, Insurance, etc..).
In fact many times in banks and post offices you found true message boards containing newspaper articles that talked about some tools that were sold in the same offices.
Reviews, citations, advertisings, ecc. that were used by the operators themselves as a support to the goodness of the proposed product, He would hear the clerk say: "See also speaks of the head X, you have seen the ads on the Y channel, etc..”.
Nothing wrong if the article is "made fleas" to the product and offered an unbiased view so as to allow the potential customer to receive accurate information.
Today, Banks, Insurance and other operators are obliged to a series of warnings and compliance with strict rules when you want to promote a financial product, Insurance, ecc. (see European directives, Ivass regulations, Consumer Code, entered into force in recent years, of adequate information, correct advertising, etc..).
But it seems that the world of information about diamonds was of no help to those savers from 2012 al 2016 They stumbled into real scams related to "precious stones".
Here are some articles and / or advertising information that did not report any explanatory disclaimer of any risks they ran by purchasing:

how many will “used the occasion” after reading the box?

How many of you will be trusted “It is never speculative” after reading the article?


"The lack of information is also information” Richard mixer
Alex Gaetani