It’s from Discovery’s website, under ‘Info and Tips’ once logged in. Spend bands don’t affect miles, you earn regardless. It’s for the boosted discounts like Healthy Food and Gym Booster. EFTs and debit orders definitely don’t count towards the spend band, it’s only swipes and online shopping.
You get almost nothing in miles at the moment but I’m told that boosters will kick in again sometime. And when the new Vitality Active Rewards launches next year, it’ll all be miles based. You’ll get 100 miles for achieving each goal (health, drive and money), so 300 miles per week guaranteed. You then also get to play the gameboard for each goal, plus a bonus play if you achieved all three. More miles will be awarded there (as opposed to the current points). Quite excited about that... Miles on spend equates to almost nothing and is just and added ‘nice to have’ for now.