buy use of an appropriate email "spam" list and send a "quote of the day" with a link to Tom's website or the forum
if someone was willing to do the legwork for this, I would be willing to kick in some money for use of the list (depending on cost)...I wonder if there are any public domain lists out there
perhaps some would think spam lists are unethical in principle
Definitely not my style, but the data is out there and readily available for anyone who cared to initiate such a project.
I'm of the belief that this should not be forced on anyone. They will seek it out if they want it, or they will find it the way they are meant to. Seekers tend to find what they need, whether or not it is what they are looking for.
I had to actively go out and search my Notes from the Universe and Conversations with God daily quotes, and deliberately signed up for them and enjoy them every day, but anything that comes to me unsolicited gets marked and reported as SPAM. Blech. I consider it a total invasion.