Kind of sporadic. I generally get 100 - 200 per day. It was more a few weeks ago. Currently, there is a broken video that is messing things up.
NOX
is just one of many mobile device emulators (think Android or Iphone) for PC/Mac. Once you have it downloaded and up, there's a link to Googleplay. That's the quickest way to find WGT. Once you've downloaded the App for WGT, right there on the first screen is the link to earn credits. You may have to wade through a WGT ad and some other stuff like spin for coins. Coins are pretty much useless, BTW.
Anyway, click on the view icon. It will play a video that should pay 2 credits from Fyber. I say should, because sometimes it fails to pay. Also it will often erroneously tell you that there are no videos. Try again. I usually don't give up until it's told me no go 4 - 5 times. Most all videos are 6 - 30 seconds long. Love the short ones. There were a couple a few weeks ago that were 1 minute plus.
I find that if I wait 6 - 8 seconds after a video, the chances of it telling me there aren't any more goes down dramatically.
It refreshes during the day, so come back often to try for more.
Good luck, and Happy credit diving.
:^)