Bojan is a very desirable player and doesn't need a bigger selling point. I imagine Ainge had calls from every contending team in the league when Utah was trying to move him. It is just insanely difficult for a contending team to come up with matching salary.
Most contenders probably wanted him to hit free agency so they could try to snag him with the MLE.
Probably still pretty difficult to trade him due to his contract. Contending teams usually do not have $20M laying around they can part with in a deal.
I can't tell if he is serious or just looking for an excuse to fire some people.
https://www.theverge.com/2022/10/30/23431931/twitter-paid-verification-elon-musk-blue-monthly-subscription
That isn't much money since the cap is projected at $134M next year. 15% of your cap is about right for a 40% 3PT shooter. They still have $40M in space this summer.
But I wouldn't cry if year 2 was a team option.