How do I earn $10 on trymyapps with IOS device(US Apple ID) for free apps?

I discovered an app and it can help me to make money. I once withdrew $2.2 to my paypal account and I see that some people get $10 on it. Can I also get that much?
By the way, its steps to finish tasks if anyone fresh need it:

Finishing one task to get $0.4

1. Just download a free app from Trymyapps.
2. Try out the app for at least 3 minutes.
3. Once you've tried the app, you will directly get $0.4 for per task

Plus, you can get even more rewards when you share your referral code with your friends on iOS. You get 50% of their rewards for the first ten tasks.
To download trymyapps, you can directly search it on your safari. 

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