The real point isn't to recruit, it's to make life easier for JWs. Now they can stand and chat with their friend, have a coffee, not talk to anyone or make eye contact and still act as a walking billboard for JW.org.
I haven't read all the responses, so I hope this was covered already.
The organization doesn't give a damn about making life easier for JW's. They just didn't want to keep printing so many mags and books that those damned JW's would eventually put in doorways of not-at-home-householders.
Householders didn't pay for them. The JW's didn't really pay for them because they felt they were doing enough giving their time and money enough for the Kingdom Hall and Assembly Hall.
Cart witnessing was about filling the cart with literature then letting it sit there. Less given out means less printing of stuff nobody was paying for. If it happened to make life easier for some witnesses, then they see it as a win-win.