While purchased email addresses may have had value at one point, they have almost certainly been spammed to the ends of the earth - otherwise, they would still be in the hands of the company selling them.
Ngenkathi amakheli we-imeyili ethengiwe kungenzeka ukuthi ayenenani lesikhathi esisodwa, kungenzeka ukuthi akhonjwe asemaphethelweni omhlaba - uma kungenjalo ngabe asesezandleni ezifiselekayo zenkampani ebathengisayo.