You can always use paint to right your email on your profile pic. (datingbusters.com)
OK ladies we are a crazy spontaneous fun couple looking to spice it up in the bedroom me and my man do nt discriminate we love for u to have confidence be crazy spontaneous nd fun wit us we ain't got time for games so please if ur serious right us an email at m put for the subject I'm down so we... (meetlocalmilfs.com)
Now to be fair half the time I forget to bring my cards and I just have the person right their email on a piece of paper if I want to follow up with them then I send them a nice email so they have it.. (biggerpockets.com)