Windows SM

Yes that is right. Every cent you spend goes towards your perpetual copy. So you can continue doing 6 or 12 month subscriptions until you own a perpetual copy.
Your participation here on the forum is worth $$$ towards it too by the way any discounts you earn through promotion and participation come off your total.

Karma is a virtual payment method for thanking people for being helpful on forums. You can hit the plus button to add good Karma to someone or hit the minus sign if someone annoys you. It's just a way to show appreciation. Costs you nothing in real terms.
I can see the karma under your name, but you can't as you can't give yourself karma. I shall give you one now for asking such great questions all night

Thank you.
Ok that question is well beyond my level of decision making. Helene will need to answer that one. If she doesn't see this post send her a personal message and ask. I am pretty sure if you already own a perpetual version in windows she will discount you a Mac copy at the least