I agree the stillpoints are expensive, I have said that all along - the Ultra SS and Ultra 5's especially - but the ultra mini's are in the realms of affordability for many I would guess. Also there is the situation where you like the sound of your kit but want an upgrade maybe stillpoints are worth considering because they will give you a better version of the same thing.
My point really is isolation / support products work - Stillpoints work amd are likely the best available. I know good isolstion product that cost £100 for 4 so that is a feasible amount for the average audiophile interested in the benefits in isolating. The good thing about these products is multiple sets can be had for the same outlay
There is an interesting thing suggested in the video - you can use little wooden blocks under kit - if you watch the video he explains it well - if they make a difference then you know better products are worth looking at such as stillpoints. I dont think this is an idea for speakers though more for components