This game is very serious and is not funny and it will cause some panic later on when ver losses on his bet. If in case ver loses then we can expect a 40k to 60k bitcoins will be dumped on the market and a sudden decrease in bitcoins value will happen. But if he will win the bet then a major increase in bitcoins value will be expected.
Where is the bet? It is just an offer, which Roger might or might not accept? There is no bet, and there is no winner or losser.
btcbroker is just showing his confidence in bitcoin core, and expects Roger to show his confidence in Bitcoin unlimited.