In this case I think all tracks are OK for commercial use.
Still, a bit amusing that curiosity made me pay 99 cents to hear my own music.

lol! what are ya gonna do?

Interesting concerns you have. I have no good answer to them and the pros and cons of the cc-by licence have been discussed here before.
Thinking about this particular case, the app was released last year and has been top 20 on the top downloaded games list over at Apple’s app store.
I don’t think 100 000 downloads worldwide is an unrealistic figure x the equivalent of 99 cents in yens, euros and pounds.
That’s a bit of money for the app owner (one individual) and for Apple (their commission).
I hope the owner is genuinely thankful to his providers of free music that’s made life more fun and finally making that trip to the French Riviera possible.
Is this immoral? Yes and no. Yes, If it was me, I would at least have sent an email to the artists involved thanking them for their generosity.
And no, how one decides to licence one’s own material here is an active decision. The app developer has done nothing wrong. The attribution is there and to my knowledge that’s what’s required.
Am I bitter? No. I’ve got food on the table and I still love my Apple products.

Yeah, I can agree with you here, especially considering the license. However, I do think the music adds more value to society than the game. Just as I feel I add more value with my art and music than I do at my real job.