The reality is that more often than not these messages are self serving and profit driven, many times borderline fraudulous in claims or questionable at best
the reality is that all messages, even those you think ought to be a grassroots message, are all self-serving. It's just self-serving for you as well as the message deliverer. And those "advertising" messages are self-serving, but not for you (or your tribe).
Therefore, this is just a thinly disguised way to try suppress the messages of those whose self-interest does not align with your own, rather than an altruistic reason.