I don't know what flux has to do with Porn Flux. I mean there is nothing really fluctuating or unstable about it.

PornFlux is a regular non-exclusive hardcore site with 120 sets of pictures and 36 videos. The movies are divided into clips, which can be downloaded in very good quality MPEG format and most of them also have a full-length option as well. 

From threesomes to one-on-one fucking, the action is hot and heavy and they are adding new photo sets every day (new videos are added every five days. They also give you a page of streaming video sites and 11 hardcore bonus sites with your membership as well. However, I saw some of the same pictures and videos from Porn Flux on a few of the bonus sites.

There is a lot of porn available here, and it is good quality stuff.  However, if you have a problem with the non-exclusivity then that migth not matter.