Through November 30, Fiji Water is offering 5,000 SkyMiles for signing up for an annual subscription and 10,000 SkyMiles for an annual subscription of 2 cases or more.
Not worth doing for the miles alone, an annual subscription will run around $360.
Two cases for 10,000 miles and cancelling doesn’t quite work for the miles alone — miles post after “approximately 8-12 weeks” so presumably you’d be on the hook for three months of delivery — probably $180 for 10,000 miles and remember these are Delta miles after all.
Still, if you like Fiji Water and would consder ordering it anyway, this is a worthwhile offer. As of this posting I haven’t tested whether the mileage offer is combinable with a percent-off coupon code.