The Reddit ad fund received a total of 22.51357574 BTC, of which 12.15558457 BTC is still unspent and available, as stated in the /r/Bitcoin sidebar.

Addresses do not "naturally" send money or have balances: https://en.bitcoin.it/wiki/From_address . It's possible to make it so that an address's "balance" contains meaningful info, and some broken wallets do this by default, but I don't. For any of my addresses except ones that I specify, you should behave as if this is an address in a Coinbase wallet or something. All block chain information except for received amount is meaningless. I've explained this many times over the course of years...