I've been on a bit of an MVC buying spree this month, so thought I'd add the following data points. I don't know if there is a precise formula that Marriott uses when deciding whether or not to exercise its ROFR -- it seems like it's not just $/pt, but that's probably the main factor with some additional variables thrown in such as the quality of the next reservation date tied to the week, 2019 vs 2020 as the next usage year, the number of weeks already enrolled or owned by the trust at the specific resort, Marriott's ROFR budget (I had quality weeks passing ROFR in 2017 at ~$1.50/pt, which is not happening now), etc. I'll add these to ROFR.net soon.
My ROFR experiences for March 2019:
Summit Watch Platinum
$11,250 ($2.54/point) -- Failed
$12,500 ($2.82/point) -- Passed
Grande Ocean Platinum, Oceanside
$10,500 ($2.50/point) -- Passed
Oceanwatch Platinum Plus (4th of July), Ocean View
$10,000 ($2.53/point) -- Failed
$11,000 ($2.78/point) -- Passed
Mountainside Platinum
$15,000 ($2.80/point) -- Passed
($/pt numbers included for statistical purposes only of course, these are all non-enrollable resale weeks)