The information is also clearly printed in the regulation.
To sum that up: renewal of the flight instructor certificate does not take the place of a flight review, but as previously stated, does take the place of an hour of ground in credit toward the flight review as stated in 14 CFR 61.56(f).
No joining AOPA required.
You stated that
This is correct, however, you incorrectly stated that
This is not the case. The error is in the use of the word "only." Renewal of a flight instructor certificate counts for the hour of ground required by 61.56...but there are more ways to renew a flight instructor certificate than simply a clinic, an on-line course, r the NAFI master cfi program. 61.56(f) refers us to 61.197, which also includes passage of a practical test, and renewal by presentation of a successful student pass record.
To sum that up: renewal of the flight instructor certificate does not take the place of a flight review, but as previously stated, does take the place of an hour of ground in credit toward the flight review as stated in 14 CFR 61.56(f).
No joining AOPA required.
You stated that
Current flight instructors who renew their CFI certificate by attending a flight instructor refresher clinic need not complete the one hour of ground, but must complete the minimum one hour flight.
This is correct, however, you incorrectly stated that
ONLY applies to someone that has renewed their certificate by doing the on-line courses, NAFI Master CFI program, flight instructor refresher clinics, etc.
This is not the case. The error is in the use of the word "only." Renewal of a flight instructor certificate counts for the hour of ground required by 61.56...but there are more ways to renew a flight instructor certificate than simply a clinic, an on-line course, r the NAFI master cfi program. 61.56(f) refers us to 61.197, which also includes passage of a practical test, and renewal by presentation of a successful student pass record.