Someone running old pool software. These will go away once enforcing is...enforced. Those blocks would be rejected unless they payout 1DRK.
Currently, they are being rejected but the rejections are not being enforced. The reason for this is so that Evan can see what exactly is happening when something is rejected and scan for unusual behavior under real world conditions without causing a fork to happen in the block chain. When he deals with all the unintended issues, and everything runs smoothly for a good while, then he will implement enforcement and no one will be able to cheat.
Currently, miners can cheat by not paying masternodes, or changing the amount they want to pay masternodes. actually, if they wanted to, they could pay masternodes 100% of the mining rewards if they wanted to, LOL. I won't complain!
But eventually, such blocks will be rejected. That's why we're calling this a "spork" instead of a fork

A soft fork, another invention by our illustrious leader, LOL.