Tom I'm thinking about asking one of my friends to lend me their card to buy C3 with it, but first I'd like to know this: Does C3 link to your credit card and pre-approve future payments (I don't want to surprise them with a 100$ purchase in a year)?
Also, do you offer the option for getting invoices to a specified company's name (a 1 person company specifically) for personal licenses?
When you enter your credit card number, it is charged again in the future for your next billing date unless you cancel your subscription.
What I would suggest if your friend is buying on your behalf is to cancel the subscription as soon as it's paid for (you'll still be able to use it for the year!). Then also delete the card from your billing pages (email me if you have trouble with this).
Regarding licensing, send me an email if you have any specific queries but licensing is changing for Construct 3 slightly in that any registered business (sole trader, LLC etc etc) must buy a business license and is not permitted to buy Personal. Again, email is best to answer specific queries.
Anyone who owns Construct 2 Personal on or before Feb 1st 2017, and as a consequence of this licensing change must now buy a Startup license because they are a registered sole trader (EG in Germany) contact us and we'll refund your first year so you're paying the same as a Personal License.