If money’s the issue (which is highly likely), you could offer to cover the advertising costs upfront, if possible,  and adjust their commission by that amount.

Tyler advertised (for $$$) a workshop on capital raising.

We have not had to advertise it so there’s no discrimination issue there.

The posts also read like advertisements/ something a scammer would write, and the property address somebody mentioned above that supposedly closed in 45 days, hasn't sold since 2006...

Thus many in our investor community are considering renting their properties out to FEMA, as FEMA just started advertising to us about such. 

We don't allow any "deal-making" in the forums, which includes advertising your services or properties, looking for partners, etc.

With the requirement to disclose this, how do you advertise and create social media posts?

I would recommend advertising on the usual platforms (FF.com, airbnb.com) with a focus on bringing value to the resident while also being very responsive to any business to business leads that come in.

I advertise on Furnished Finder, Zillow etc. 

You left out information that maybe relevant such as taxes/insurance per year, maintenance cost anticipated per year... plus other expenses depending on rental such as management fee(if you aren't manager), advertising cost to acquire renters, etc....