If you are not a paying member, just a free members.
You will have to build your list for them in order to share their random list, unless you are lucky
I was once a member, the response rate is not that good with compare to the money spend. I never recruit any member for them though :0) No time to build people list.
I suggest you build up your own.
YLL and safelist are about the same concept.
Even though the site says it is different. It is an enhance version of the old safelist.
If you are just starting, you can try safelist that are free. But the response rate is very very low. You can try to recruit them to your list if you can.