I got the 50K upgrade offer as well. My anniversary is in May and that's when I last received the free night cert (for up to 25K) and the 15 elite nights credit. If I take this offer, when would I now get my 15 elite nights (not that I need them since I am now LTPP) and the free night cert (up to 35K)? Would it still be in May 2019 or would that now be in Oct/Nov 2019?
Also, how is the annual fee charged? Do I get a prorated refund for the $85 that I paid in May and then the full $95 is charged or do I get charged in May?