How to buy tickets for yet-to-be-advertised or "Sof

I get 9:30's email newsletter, and there's a list of shows under this heading:

For loyal readers of our email blasts only, we list yet-to-be-advertised or "Soft Sale" shows at the 9:30 Club

How do I buy tickets for them? I don't know what "soft sale" means.

Thanks for any help :-)

The shows listed in our newsletter are not yet advertised or at times, not available, to the general public. If there are no specific instructions listed, such as pass codes, etc., you may buy directly from the box office or the designated ticket retailer.

Since you receive the e-blast you will notice just below the "Soft Sales" a link to click on to purchase tickets.

That link will take you to www.tickets.com where tickets for all 9:30 shows can be purchased. Additionally you can buy tickets for all shows, including soft sales at our box office.