+1 to Blackcat - it certainly does count.
I would absolutely use it. You have to use it within 90 days of earning it, and in your case, the SC would be much better than the points. If you are not expecting to requalify WP next year (and the 50 SC is not enough to make a difference next year), then it would be "wasted" to defer it to next year - may as well guarantee it for this year.
It will still count to lifetime whether used this year or next. If you won't make WP next year, there is no point "keeping" it to contribute to making it to SG next year, when the alternative is to ensure WP now, then soft land to SG the year after anyway.