As posted on GEDmatch’s page, it is no longer accepting FamilyTreeDNA (FTDNA) uploads. No details other than requesting you to contact FTDNA if you have questions. Numerous requests posted on FTDNA’s Facebook page and in various Facebook groups that include one or more FTDNA employees have not yielded a response from FTDNA. If FTDNA hadn’t shot itself in the head so many times in the past with unwise decisions, I would be inclined to give them some slack on this one.
The note says
NOTICE: We are no longer accepting FTDNA DNA kit uploads. We have been asked not to say why. Please Contact FTDNA if you have any questions.