I use evernote all day every day, and I use mostly homemade flash cards. Evernote doesn't owe you anything if you're a free user, and if you're premium, then you obviously dig it enough to pay for it, so what's the problem?

Today I learned there are people who consider themselves serious users of flash card apps.

I use Evernote every day and it doesn't annoy me as a diversion from their core product. The smart Smart Cover integration is cool, at least.