If you watch Sky TV at home, use a Sky Mobile SIM in your phone, or connect to the internet with Sky Broadband — you’ve just been treated to a free blockbuster film from the Sky Store. The generous giveaway comes courtesy of the Sky VIP loyalty scheme, which is free for all Sky customers to join. For a limited time, Sky VIP users can download Ghostbusters: Afterlife from the Sky Store. This isn’t a rental — the digital movie will be yours to keep forever. Head to the Sky Store to buy the title for £0. The movie will be available in High Definition, HD. Without the Sky VIP discount, you’ll need…