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You're wasting time in that the server could just as easily say "win" or "lose" rather than making you spend that time pretending to scratch numbers. It's no more wasteful than a paper scratch card, except that with the paper scratch card the waiting is a necessity, whereas online it is not.

That said, my use of the word "waste" is not meant to be negative - they've left that feature in the online version of scratch cards for a reason, because they feel people prefer to have that time wasted - and, as I said, if playing online roulette, I would rather waste time seeing a ball roll around than just being told if I had won or lost.

The paper card could just say "win" or "lose" too.

And those cards are available - but there will always be an element of time wasting due to the fact that paper cards need to make you scratch away, whereas online versions do not.

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