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If you join this CU via Association of the United States Army, you will have to pay $33.00 fee ("For those joining the Association of the United States Army as a means of qualifying for credit union membership, a $33.00 AUSA membership fee is required." ). So you will get $75 - $33 = $42
There may be other ways to join but I did not have time to explore them.
Terms:
Open a Checking Account with Direct Deposit receive a $75 Bonus*
Now when you open a a new qualifying Checking Direct or Choice Checking account with Direct Deposit, you'll receive a $75 bonus*. To take advantage of this special offer, contact us. If you are not a member and would like to establish an account, you can complete our online membership application or contact us.
*Direct Deposit must be initiated within 30 days of opening a Choice Checking or Checking Direct Account to receive the $75 bonus. The minimum Direct Deposit allotment to receive this offer is $250. The bonus is a credit that will post to the account within 60 days of the initial Direct Deposit. Bonus shall not be considered part of the opening deposit amount. The Choice Checking or Checking Direct Account must remain open for 12 months and have Direct Deposit or the $75 bonus will be debited (subtracted) from the account balance at closing. This offer is available on individual accounts only. This offer is limited to one per account number. Members that already have a Checking Account at America’s Credit Union, are not eligible for this offer. Some restrictions may apply. Ready Reserve (overdraft protection) is subject to qualifications. You must deposit at least $1 to open the Choice Checking or Checking Direct account. This offer can be modified or withdrawn at any time without notice and is not transferable.