Now the issue has been raised here in this ANN thread maybe Whirlwind will post here soon with an update including the missing daily rewards. To this point only two participants of the signature campaign mentioned missing anonymity mining rewards. If others calculate their balance and find themselves short they should also post about it.
The system Whirlwind have created seems to work very well. Their onion site doesn't suffer like their clearnet (which is under constant DDoS) and their service give users anonymity. The problems are about correct anonymity mining rewards and poor email customer services. I am sure they will explain in detail when they post again.
In isolation, if you look at the bigger picture their email support does not seem to be to a high level and an explanation is needed about the 12% APR for anonymity mining therefore apart from these two issues there do not seem to be any complaints and that is a good sign.
Indeed, there were no other complaints so far about them, excepting the mining rewards and the lack of support... At same time, I don't know if the problem with the daily rewards is a systemic one (meaning if I did not get the rewards in a specific day then all 566 depositors also did not get their rewards or a random one (meaning that only a few random users out of all 566 depositors did not get their rewards in a specific day).
If the problem is systemic then it's a bigger one. Imagine that all those 566 depositors would be supposed to receive 2000 sats in a day. If the problem affects them all, then this is a missing payment of 2000 sats x 566 users = 0.0132 BTC, which is a serious amount. Now if such problem occurs 10 times in a month, the mount goes up to 0.132 BTC. And so on.
Obviously, we can't know what amounts in daily rewards are supposed to be paid to the depositors, but I just gave an example.