You'll actually find out that this is based upon the BOINC platform,
which supports many different distributed computing projects. It
actually grew out of the SETI (Search for ExtraTerrestrial Intelligence)
project which was started in the mid-90s, which was when I started using
it.
There are currently 319,060 active contributors running this on 567,770
computers producing 1,441 Terraflops per hour! I personally have
contributed almost 27,000 hours of computing time, which places me at
the 96% percentile of BOINC contributors and 94% in the US.
Just note that running this does cause your computer to use a lot more
power. On board my laptop draws ~2A @12V when just running, but draws
close to 8A when running BOINC.