The payments were made form 1844aNo5gAssVSmUmLwk6qG61uBNdQswH3 as shown in the payout history on their website.

0.0087 BTC was sent from 12wmRSVf1e6MTpmvGuUxreEXxbaRHkepuC to 1JgxteZWCuZLu4FnPUWv3Jxgj89QkFXLvX which sent 0.0087 BTC to 1844aNo5gAssVSmUmLwk6qG61uBNdQswH3 which sent 0.0001402 BTC to 12wmRSVf1e6MTpmvGuUxreEXxbaRHkepuC.

In other words, payouts are funded from new customers buying contracts.

More (found by jimmothy):

1PdvNQYCnWP9NftxE6gu5DvYVSnkgwnXu3 > 0.0087 > 1GSWxmZU3oHiyBA7PhoqE5ZrAN5YHtjbYx > 0.0087 > 1844aNo5gAssVSmUmLwk6qG61uBNdQswH3 > 0.0002804 > 1PdvNQYCnWP9NftxE6gu5DvYVSnkgwnXu3

1PdvNQYCnWP9NftxE6gu5DvYVSnkgwnXu3 > 0.0087 > 1LTcF4xkch1d5Gb5yTkbGCUsjspHp9KWVp > 0.0087 > 1844aNo5gAssVSmUmLwk6qG61uBNdQswH3 > 0.0002804 > 1PdvNQYCnWP9NftxE6gu5DvYVSnkgwnXu3

1s3DP7QaqwsRrTEn6UQBd9zPCmmvv6KW3 > 0.0087 > 1DzwbKnTXSJtnW2QXjE5EtV1TSSa5bDfki > 0.0087 > 1844aNo5gAssVSmUmLwk6qG61uBNdQswH3 > 0.0043462 > 1s3DP7QaqwsRrTEn6UQBd9zPCmmvv6KW3

Edit: The website was been redirected to Cloud Mining Website on Jan 22/23 2015.