Is it even possible to earn more minutes in summer league if you are in his position without an injury? The NBA acted so uninterested in him that they didn't even give him a combine invite, he goes undrafted, it was obvious he was going to only pick up 10 minutes or so a game regardless of what SL team he jumped on. And he hand picked the best possible spot - Cleveland SL team is weak at his spot. And plays about as well as possible in the minutes given, but there is no immediate reward. All the scouts there are like playing on their phones when he is in, or taking bathroom breaks.
I can't recall many guys that play well in their 10 min SL slot, and then all sudden get 30 the next game over guys that had been starting or anything.