I can't be 100% sure.. But here take a look at the payments at

http://btc-flow.com/page/transactions

They do tell like 0.5x , 0.4x, 0.6x payout, but if you look at the transaction hash of every payout, for example, this

https://blockchain.info/tx/07ae19445a84493ed4a41c8d9f63a2cf3cb17b95b9b49b4c5e86f906569df234

The summary at the bottom is

Inputs and Outputs
Total Input                           1.73119284 BTC
Total Output                   1.73099284 BTC      1.73119284 - 1.73099284 = 0.001 btc
Fees                                   0.0002 BTC
Estimated BTC Transacted   0.001 BTC

It does have lot of addresses at output side, but from my knowledge, I assume exactly just 0.001 btc is payed out and all the remaining btc where transferred to the OP's own account as a change (but its to distract us to pretend they're paying that much btc regularly..).  The fact I'm telling it's tranferred to OP's other addresses as change is coz I too may done that before using blockchaininfo online wallet. I mabe completely wrong, but no one can pay this huge amount within short periods regularly..