The special is not listed at the credit union's website. It was mentioned on the FW CD thread. I called to confirm and to obtain additional details.
The $5K max makes this a very good deal. This results in about an extra $225 over what you could get with a market leading 12-month CD. If you can open one for each member of your family, you'll add another $225 for each.
The credit union's field of membership includes those who live in Harris and Montgomery County, Texas. Also, there's a long list of Select Employee Groups. A minimum $5 deposit into a savings account is required for membership.
The credit union is NCUA insured with 78,000 members and $334 million in assets.