I scratch two rows or two columns, but which ones change around.

I always scratch random ones! Obviously the strategy hasn't helped me yet, but oh well! xD

I click as many spaces as I can before the page refreshes, click the ones I didn't get to before until it refreshes, repeat until the spaces are all used. So it's always random based on how many go through each time. :u

I scratch them randomly.

I scratch the bottom 6 rows if there's no lag, then I start clicking randomly until it disappears. I've got about 1,000 scratched so 4k more to go!

I just always do middle three and bottom three. And when I scratch, I scratch a couple hundred cards at a time :) I can't recall winning the jackpot, but Malerias cards have given me a good amount of stats!