To bulk mail or not to bulk mail
…is actually not a question.
Sending out unsolicited emails (aka "Spam") is not considered a minor offense but a felony on the web.
If you want to be taken serious and build trust, don't fall for offers that promise to sell you X-thousand or X-millions of email addresses that you can use to advertise for your page and products.
Even if it seems like nobody wants your products and nobody visits your web page: The latter is still better than having hundreds or thousands of people complaining about you and ruining your reputation as a business man/woman. Once you or your web page is blacklisted, it is next to impossible to undo the damage: You might as well start over with a new name, new account, and new page.