If you read the details carefully, the August merger of your SPG and Marriott accounts will require each Rewards Member to take a proactive step to merge them "
"Simplify your experience — one account, profile, login, points balance and Elite-night balances.
- So, if you have an SPG account and a Rewards account, you can combine them in August to consolidate your points, Elite nights and profile into one. You’ll need to do this even if you’ve already linked accounts."
The Operative words in these bullets are the words "can" and "you'll need to do this even if you've already linked accounts". This means you don't have to do the merge in August. Which then begs the question, is there any benefit to waiting?
I'm not sure, but this may be advantageous to those that are close to making the next tier...e.g. perhaps they can delay the merged accounts until they have enough points/nights/years to qualify under one or both programs. Just an interesting twist that I thought might be worth mentioning as we continue to peel back the onion.