Have not been doing E-rewards as often lately, but just had one recently that paid off big! It was a fairly short survey about restaurants and at the end asked if I'd be interested in an in-person focus group, to which I said yes. It actually happened - a consulting group contacted me and I just made $150 cash yesterday for an hour of my time. Funny thing was, there was only one other person in the "group" - she mentioned she didn't even remember how she got picked for it. I said "Oh, I do a lot of online surveys so I think it was from that" and she replied "Yes I do E-rewards, so it must have been that!".

Hilton points
 

I redeemed for Hilton points on 6/25. They posted yesterday.

Just had this reply from E rewards when I queried non award after six weeks delay
"BAEC recently reported that they encountered technical issues for redemptions that were sent to fulfillment on the month of June. Unfortunately, this redemption is included in that transaction.

We sincerely apologize for the delay. Rest assured we are working directly with BAEC to rectify this issue as soon as possible. We are sorry for the delay."

I get 3-4 emails from erewards daily about surveys but every time I click the link I get the message: "Unfortunately there are no available surveys for you right now. Please try again later." What the heck?

About half the time when this happens to me, I can click on an older email and still get a survey. They don't seem to care about accurate software and message content, sometimes.

It seems that BA have sorted their IT issue,Avios claimed 6th June posted today.Showed a transaction date of yesterday

I'm in the same situation and was hoping that the FT hive have a solution. It's not as simple as "clicking on an older email".

Something happens on your computer when you take too many surveys - you reach a point where you are simply told 100% of the time that you have no available surveys. It happened on one laptop so I switched to another laptop and immediately could happily continue taking surveys (but only with that laptop and not the original). Now the second laptop has run into the same problem.

I've cleared cookies, tried new browsers, incognito mode, etc. Nothing seems to work.

Maybe they generate some device fingerprint and then block fingerprints they are not happy with for whatever reason.

Exactly same with me.

I too got the emails telling me there was a survey and then telling me there are no surveys. As of 5 minutes ago I successfully completed a survey. Maybe it is just a matter of time.

Data point: Redeem Hilton points on July 20, posted on August 6.

Possibly in same batch. Mine redeemed on 7/27, posted on 8/6.

My previous redemption has been double-posted after back-and-forth complaint. Great!

Over looking the obvious?
 

You're focusing on the device on which you are taking the surveys. I really don't think it's all that complicated. It's not anything on your device that cuts off the surveys, obvious to me that e-rewards has a set limit on the number of surveys that can be taken by any account in one sitting (or some time period), and they simply "cut you off" from further surveys until that period expires. Not a matter of a "fingerprint" left on your device, or a cookie, they are controlling it from your logged in account on their side. When it kicks in, you can click on current or old survey links until you're blue in the face, generally it "ain't goin' happen". And they obviously are not goin' communicate as to what their specific policy is...