Sorry too late reply, I think there is no problem on this conditions.
I think this MA uplift ratio is acceptable for general case.
By the way, I have a news related this matter.
We, Tsuchiya Headquarters have been suffered from MA charge increase of Oracle JDE for this five years.
This year, I decided to discontinue MA from Oracle and made the new contract with Rimini Street, 3rd party MA vendor.
http://www.riministreet.com
They run MA service in nearly half price, even though we have a lot of conditions to accept.
Actually, Rimini street does not support Infor Product, but the 3rd party MA market will growth in future.
Someday, TCY might have a chance to get an additional alternative.