I am sad about this since I was an Instapaper Free to Instapaper paid convert. In fact, I would never have used it if I hadn't used the free app. I know I'm in a minority of users, but I still think the free is useful. Having initially spent many months using my iPhone and not paying for any apps at all (only downloading free apps), I took my first step into paid apps with a cheap $0.99 app, and realized that for the…
And you'd be losing some very good customers if you removed the free app. He's presented empirical evidence that he's not losing any, the exact opposite happens, he gains customers by not having a free app. You've presented your gut feeling. There might be something behind the 'critical mass' argument that some are saying, but that's impossible to test. Yours seems very wooly though.
More importantly, the argument of "he'd lose customers if he removed the free app" is about long-term, future effects. I perceive that Matt is trying to say that, say 1 year from now, the paid Instapaper app will have fewer customers if there is no free app in that interval than it would have if the free app had existed in that interval. Of course, this is fundamentally impossible to test, and is based on gut feelings, but it was not disproven by any "empirical evidence" presented by Marco. But it's no more unreasonable for any of us to have a gut feeling in this respect. Personally, I believe a lot of Marco's rationale, and do think that he's better off now without a free app, but he certainly did not prove this conclusion.