10% of the block reward goes the development fund.  A request for proposal is made to the community. If a person makes a proposal, it is approved, and when that person delivers the work, they get compensated in DCR for their work. It is a fund to encourage other people in the community besides the original dev team to start making improvements to this coin. Here is the link to the address with the disbursement fund. https://mainnet.decred.org/address/Dcur2mcGjmENx4DhNqDctW5wJCVyT3Qeqkx
At this moment nothing has been spent from this fund.
I am not certain who controls the private key for this address. I suppose that it could be subject to abuse.
Edit: I guess Decred Holdings Group LLC ("DHG"), a Nevis LLC controls the private key for the fund. They are an offshore corporation it appears. Not certain who the officers are at the moment, but probably the members of the current dev team.