CloudFlare is useful for baby attacks and other stuff, but it seems they are being hit very hard.
It's just that I think Seals doesn't really use them for DDoS protection. The IP server of the Seals poker server is open in public used in the clients, so no need to DDoS cloudflare, they would just DDoS the Seals server directly. If they would 100% use CloudFlare's 200$ a month extra DDoS protection, I think that would help.
Then again, I am not expert on server level :p I just use the Free cloudflare service for simple first level protection against spam bots and caching images on my sites :p (these sites do not really need DDoS protection anyway)