Some membership list maintainers publishing their list complete, including SWL IDs (when they can join the Club). Although SWLs mostly do count, you can't work them. Adding of incoming SWL QSL cards to your log file is not a very good idea because such record will 'skew' other statistics. SWL IDs in Membership lists is a matter for consideration - it does not harm anything but will never appear in lists (award applications etc.) produced by CQRlog.