Making sales is about your site, your opportunity and your offer. If you have written a copy and posted it in a social bookmark site, and this copy attract their member and they have clicked the link in the copy to visit your site, that mean they are interested in your offer in the copy how your site convert this interest is another issue.
Even if you are promoting a work from home opportunity, it is hard to make interested people join your opportunity unless you have some thing special to offer them. If not try to post the opportunity link directly in the copy so they will go directly to the opportunity site with out going through your site. "use your affiliate links"