The few wealth points you got is the biggest part of the reward - since there is no other way to gain these, typically we value these at 800 gold per 1 influence point. And if we`ll allow to buy these for gold down the road - this will be the rate.
And about the Dragons - if that player would have lost his Royal Dragon - he would have lost 120 influence points forever! And that is a huuuuge investment to loose. If you would have actually managed to kill his Dragon - your Influence reward for the battle would be around 30 btw. And since it looks like this player takes a lot of risks with his Dragon almost getting him killed - one of these battles somebody will get his Dragon killed.
So as you can see there is a lot of pros and cons here on both sides.