A.) He already has his contract from Barcelona that was significantly higher than what they said they'd pay. It doesn't keep him from considering an offer from the Jazz, it just sets the floor.
B.) He couldn't communicate with the Jazz until July, so his option was to take the deal or wait until July and see if a better offer could be had from either team. Not a sure bet that something couldn't dramatically change between now and then.
C.) He had significant leverage, and there's an NBA buyout in the new contract (although how much is unknown).
D) Most of us would have taken the offer from Barcelona instead of hoping that things went well this summer.
E.) The Jazz stopped talking publicly about if after he signed the contract, but there seemed to be considerable interest on their part. Depending on the specifics of the buyout, there's no reason to assume that interest has changed.
F.) If Utah wants to bring him over, they have the resources to pay off the buyout and make a very competitive offer. Depending on how the draft goes, I think there's still a slight chance that they may go that route.
G.) Tomic used the leverage that he had to get a good extension from Barcelona, but there's also nothing stopping him from meeting with the Jazz this summer and deciding to come over if they want him badly enough. As I see it, all he's done so far is made sure that both teams can't lowball him. He got the best deal that he could from Barca, and if the Jazz offer him something significantly better, I think he'll consider it.
I get why fans have fatigue over Tomic, but the Jazz spurned him first. After testing their interest in 2012, he signed with Barcelona and developed exactly how we'd hoped he would. The fact that he has options doesn't make him a bad option. The buyout has been (and always will be) the key factor. I'm not expecting him to come over, but I haven't completely ruled it out. He took the best deal on the table, but still has the potential to upgrade. Pretty sure Id have done the exact same thing.
Out of curiosity, approx how much would his salary from Barcelona be yearly in US dollars, if he's among the top paid European players?
https://hoopshype.com/rumors/tag/ante_tomic
According to this site, Tomic was asking about 2.1 Million euro, which would be about 2.5 Million US dollars. Jazz could easily beat that.