How do you know this?

The WU produces the same output, but using less CPU cycles.

Many, many pathetic words, my capitalist friend, but no answer yet - why the same calculations have begun costing much, much less.

PS: Surely, I crunch wcg projects to help conquer all this filth, cause otherwise I'd crunch smth more stupid - green little men or countless math ciphers . But credits are not to be put aside and forgotten - they enkindle me to infect computers with the boinc strain on and on ).

Perhaps you did not understand what I was saying. At WCG there is a tasks completed ranking system (I did not introduce this ranking system, and I don't have the option to opt out of it and still contribute).
When one task completes 8 times as fast as another, it belittles this ranking system; some/lots of crunchers will mainly crunch the tasks that finish the fastest, rather than what their concurrence tells them. I would encourage equality of task length, as best as possible and even if it means bunching tasks (as with other projects), in order to discourage such activities.
Such time variation also throws Boinc's calculations off, as it sees all WCG tasks as belonging to the same overall project. So switch from HCC to HFCC for example with a 5day cache and you might download more tasks than you can run in 10days.

I think you use strong words a bit too readily; the number of tasks someone completes is not capital. Other projects do increase points when they improve their apps, so you have a point, but it's a bit rich to be asking for more points and shouting capitalist when someone asks for increased runtime. As for filth, not necessary.

I'm really sorry about your mother and your friends.And you are absolutely right.
Credits, ranks, all that doesn't matter.I'm here to help.To do something that might be useful for others.
Forget about projects like primegrid or DNETC@home(which from what I can tell is for profit to the developers).Forget these useless math projects.If you want to use a GPU for BOINC then use it for GPUGRID and not collatz or SETI@home or milkyway@home.
If you crunch at astronomical projects then stop doing it, switch your CPU's for WCG and your GPU's for GPUGRID and go to zooniverse.org . There you have several HUMAN Distributed projects where you see lots of pictures from galaxies and stars and a lot of things.Maybe you'll even discover something new(it has hapend several times at zooniverse)

As nanoprobe said, I hope you get my point.