I think 75 is an awkward number, and 100 will be where the minimum purchase to receive member perks shakes out. I will not be surprised if it does not happen this next year, but I will be surprised if it does not happen by 2020-2021. I think smaller add on contracts from Disney will always be possible, but with 100 being the minimum for new members buying direct at so many properties, it makes sense to make 100 the new minimum for perks.
We are new to DVC as of 2018, but have been around Disney and going to Disney for over 30 years. The way Disney increased everything over the past year, to include charging guest to pay to park at all hotel (non-DVC of course), I will not be surprised to see the minimum increased. I think prices will level out by 2021 and we will not see drastic increases like this again for a decade. But Disney is definitely setting the new normal with their prices. This is also the most new construction projects I have ever seen all across Disney World at one time.