Single post in Shiny / Albino rate update

I'm a little confused. I got one shiny in a chain of 300~. Does this mean, by estimate, I would now have to get a chain of 600~ for one shiny? Or, does it even out because of the new boosted non-hypermode rate + the boosted long chain rate? Edit: I would like to say that when I got the free week of hypermode after the shutdown, my shiny chances were ~1/60, would they now be ~1/120 for hypermode users?