Yeah, he made a little fortune with it:

As of press time, that address has garnered 6.32570673 BTC, an amount worth just under $15,000 at current prices. While most of the transactions involved, numbering 556 according to Blockchain.info, were small in scale, one notable contribution was for 1 BTC.

https://www.coindesk.com/markets/2017/07/13/bitcoin-sign-guy-nets-almost-15000-after-fed-chair-appearance-goes-viral/