I think the bet amount is not the most important thing he want to share, but he want to say that winning streak on 2x payout is possible.
Bet amount is the important thing in gambling. There was a guy who won 100 btc just in a bet, do you think it's not important compared this "14 winnings streak"? Or do you prefer win 14 in a row with small amount than win 100 btc in a bet?
Seeing 14 winning streak in a row has psychological effect to players. We all know human mind works in a complicated way, this will trigger imagination and assumption to us, making us, curious about our assumption and eventually try what is running in our mind. Aside from that these green streak somehow establish a trust to the site. This is more on the site's game rating and evaluation.