Originally Posted by
Horace
Yes, there's an error in the analysis.
Linked status goes away when the programs are combined in August. Only earned Marriott Rewards Gold Elite (earned by achieving 50 elite nights) becomes Platinum Elite in August.
SPG Gold Preferred Guest becomes Gold Elite in August.
There are more details in my post a few posts above this reply.
From reading at tpg and one miles at a time, it seems that you don't have to earned 50 elite points to convert into Platinum Elite
If you are Marriot Gold due to your linked account with SPG, you will automatically become Marriott Plat Elite August 1st.