I might be alone in this, but I absolutely hate landing pages like this. Your copy is absolutely correct: it IS a bait and switch.
I was ready to pay for the app to try it out, and now I can't give you money? I understand the data you could gain from this is valuable, but is it really worth it? I'm not going to throw my email address to you for an app I'm mildy interested in trying, especially after that.
Sorry you feel that way :( Awesome that you were willing to give us a try though, thanks!
As for the data, it really is worth it for me. I don't have an iOS dev license, or know anything about mobile development particularly. If I'm going to dedicate weeks of my life to this, there needs to be at least enough interest for us to break even, or it's not worth it.
So by that rationale, we should have stuck with Mosaic, and Internet Explorer, Firefox, Chrome, Safari, Opera, and Konqueror are all bad things?
How about the various mail clients, office products, ftp clients, torrent clients & servers, programming languages, power drills, clothing lines, gasoline engines, kitchen knives and so on?
Tools are about innovation. Standards are about locking down feature sets so that tools can interact in a common way. The whole point of the xkcd comic is that too many standards makes it difficult to make tools, and adding yet another one-standard-to-rule-them-all usually backfires.
It's a neat little device. I bought mine probably a year or so ago and it's sat largely un-used. I think they were fairly new when I got mine, so these issues might have been fixed, but...
1) small size (think mine's 7 inches or so?)
2) difficult/impossible to write small enough to fit a good amount
3) no way to save pages (in any way). I tried to hack my way around this by snapping pictures of full pages, but it just became too much of a hassle.