Thank you for bringing this up. I would still draw the "indie" label at a small dev team, but those games you mentioned - at least Burrito Bison - while fun, and it has some interesting bells and whistles but at the end of the day isn't particularly meaningful - just press a button and sit back, maybe have a few interactions with it in-game, buy a few things, wash and repeat. They're still "indie", but perhaps in a whole different level of games, compared to Super Meat Boy or Braid...there is no way the intention wasn't to make something addictive that would monetize well. But, it is the Flash game market and to make a living off of that, that's what you have to do, I suppose.
Thanks for reminding me why I even do game development. Occasionally I get too wrapped up in marketing and the like...trying to think how I'll make any money off of it, and while important, what's the most important is the actual game itself (who would've thought?). Although to reiterate, I do understand why Flash games tend to usually be different in terms of intention - it's hard to deviate a lot from the formula and still manage to have food on your plate.
To add to stats, my first game sold for less than a thousand :P