ULU ... I don't believe there's any "discount" from this site. Linking to the site Sponsor websites from here just counts towards the site, showing that their sponsorship is financially favorable to them (by the # of times those sites are linked to from here).
NOW .... there are "some" site sponsors that have sales & discounts posted on the Member Sponsor Classifieds, so I'd always check there, first, before ordering thru the sponsor links.