In Spanish 21, 8D,H17,DDD,-.44%, what is the value of being paid the bonus for 5,6,7 card hands even if you double?

For instance you ante $1, you get a 4 card 11 and double, so that you now have $2 total bet, you are dealt a 10, and the dealer pays you $3, so that you now have $5 total.

I realize the 5,6,7 card 21s don't happen often but was curious if the extra payments made the game into a positive edge off the top.

Thanks.