"
I have had the same concern. However, in this post from thepointsguy.com (
https://thepointsguy.com/news/marriotts-david-flueck-combined-program-questions/), there is a video of an interview he did with David Flueck, SVP of Global Loyalty for Marriott International and during the interview, Flueck basically stated "For this year [2018], all of the existing requirements for Lifetime continue, so people who are really close can still hit Lifetime status this year." The quoted text is from the post from The Points Guy, but in the video, that is what was said.
We'd still like to reach the requirements for Lifetime Gold before 8/1/18. Already transferred 50,000 to my wife's account. Is it confirmed that the purchase of points from Marriott will add to Lifetime totals?