From their site:
The Moxie 50% Sale (Buy One, Get One Free) Sale commences Friday 26th August 9am AEST and ends Friday 26th August 12AM AEST. Sale only applied to the offical Moxie Online Store. Sale excludes Moxie Sampler Pack. Household limits apply when ordering. Moxie classes house hold limits as purchases up to 10 packs per stock line. If more than 10 packs per stock line is orders you will be refunded any packs orders past 10 per stock line. Definition of 'Buy One, Get One Free' - purchase any Moxie product and we will send you a 2nd pack of the same product for free. The 2nd free product will not show on the invoice or packing list. If you have any questions in regards to this sale they should be emailed to [email protected]. Normal Shipping conditions and fees apply.
Can't say I've ever thought to by tampons online. It's not like they're heaps cheaper than just picking them up with your groceries either, particularly once you've included postage.