Anyone who knows what happened to paidclicks and 10bux?

I don't know that they paid their users. I do had the account in both sites but I stopped with out any clciks and refferals as they are not paying. All your efford in getting the referrals gone into vein. If you need some more instantly paying sites, look at my profile.

Maybe their system just wasn't successful so their ability to pay their participants has gone blank... did they ever pay you before?

I was member, but stop clicking there. I do not trust these sites anymore, I think they are or will turn into scam. But hope just for all your effort that you will be finally paid. Check the forums what people talk, have they been paid or are they complaining? Did admin clarify why there are delays in payments? Usually the forum is the best place to find out what is going on with the site.