There are a number of things you can do to add more value, giving ads away is never something we recommend but giving away other exposure can be a win-win.
The reality is that everyone can use more exposure - including you - so let's do something about it.
For advertisers of a certain size - perhaps they have a print ad, their spend exceeds a certain dollar amount etc - do a Facebook live at their business.
This can be you - the publisher - it can be the sales rep, social media manager or whoever wants to do it.
Now, doing a Live is fine but let's get some mileage out of this effort.
First, promote the upcoming Facebook Live via email and your Facebook page. This provides more touchpoints with locals for you and your advertiser.
Use this as an example for future sales and reference in print if applicable.