Hi, AW fee of 30% will always exist yes.
For how it works, in my experience there is 2 main ways to do it.
First: You pick a day you want payout and that day the group will take the credits and send you the funds instantly on your chosen day. (Higher quality group/setup).
Second method: The group will transfer the funds (usually on a Tuesday) and pay you weekly with 2 weeks delay. (Low quality group/setup).
Short answer is this group (3.5%)
http://groups.adultwork.com/19820 (can be joined here
www.dailypayservice.com/join)
And other recommended group is here (6%)
http://groups.adultwork.com/21266 (can be joined here
https://clubdailypay.com/join-club-daily-pay/)
In this industry, it can be quite the wild west out there, to put it bluntly, there are sharks in these waters. Its good to do research before hand and it all starts with asking a question like you have done.
If you have another group in mind not mentioned above post it here and we can give you some info on them, eg good or bad.
Thanks
For the %, each group will have its own %, try not to pay over 6% and they may offer other benefits too.