Building an Organic Mailing List

[Gage Clark]

Hello!

I was wondering if anybody had any luck doing their own organic leads data? I built my own and am at a crossing roads. Should I use it for myself, or should I sell it to others to use? What has your experiences been on mailing lists? What return rate/response rate should I expect just running a passive marketing campaign?

Any tips or advice is greatly apprecaited!