I have been using the Bittube extension for a good while and I really enjoy using it. I have 8.33 tubes so far and I'm still trying to earn more. I want to be able to earn 1 per day, but I don't browse enough for that to happen. I think I was able to reach that once on a Saturday when I was on for a few good hours. Normally I am able to get .25 to .50 per day based off my average browsing.
I have 1.50 worth according to the little graph when you click on the extension. Hopefully that credits to my account and I'm able to transfer it to staking. I will be building up these tubes for a good while. I still haven't looked into what it takes to be able to get stake rewards, but it's on my to-do list. I will update you the next time I get more tubes or figure out this staking deal.