Found an interesting article relating closely to our topic which we could also take a look at:

Let's make a deal: An analysis of revelations and stipulations in lonely hearts advertisements.

Harrison, Albert A.; Saeed, Laila

LINK:

http://ovidsp.tx.ovid.com/sp-3.4.2a/ovidweb.cgi?WebLinkFrameset=1&S=PMKIFPCIEDDDJFHKNCBLOELBAGLHAA00&returnUrl=ovidweb.cgi%3f%26TOC%3dS.sh.15.16.20.34.39%257c8%257c50%26FORMAT%3dtoc%26FIELDS%3dTOC%26S%3dPMKIFPCIEDDDJFHKNCBLOELBAGLHAA00&directlink=http%3a%2f%2fgraphics.tx.ovid.com%2fovftpdfs%2fFPDDNCLBOEHKED00%2ffs046%2fovft%2flive%2fgv023%2f00005205%2f00005205-197704000-00008.pdf&filename=Let%27s+make+a+deal%3a+An+analysis+of+revelations+and+stipulations+in+lonely+hearts+advertisements.&link_from=S.sh.15.16.20.34.39|8&pdf_key=B&pdf_index=S.sh.15.16.20.34.39