...you may hear me say things at the end that sound like I'm bad-mouthing Angry Birds and Cannabalt. That is anything but the truth. I think both of those games are fun and I've purchased both. What I was trying to say is that I'm surprised that for those games specifically have seen such resounding success... like, "tipping point" amounts of success (Angry Birds, specifically). Another example I failed to list was Mega Jump vs. Doodle Jump. While the latter came first, I would still argue Mega Jump is a "better" version of the same game mechanic... but not nearly as lucrative.
But hey, in the end, I buy and play them all, so all those developers have my money anyhow.
Another example? Bejeweled. The entire franchise. I paid $19.99 for Bejeweled 3 when it came out and I loved every moment of it. Why? I don't know and I still don't know. Maybe it's a mindshare-brainwash thing.
Don't look too much into it, folks. Play and make games because they're fun.