If you want to contact anyone or read messages you get you have to pay.

Their pics, their bios.   All the better to entice you to pay to join and be able to contact these beauties.

You’re allowed to message for free

Yes I think you can send a limited number of messages but can't read any.
So in theory you could send your phone number to these gals but if they know you're too cheap to pay the membership fee it's rather unlikely they will respond. And you can't make any real P2P offers on the platform.

for the responses.

If you read lots of past posts on this forum you'll find a wealth of information.  Sometimes SA is extremely frustrating, other times it's a freakin gold mine.  But the guys who are willing to work it wind up with lots of wonderful young pussy and are very happy to pay the fee for membership.