We do not recommend you pay any suppliers for the "pleasure" of seeing their product catalogs.
Business owners can find some success with these types of suppliers when starting off because they might have decent starter products that can easily be ungated.
Long-term, paid suppliers are not a scalable source of product for your business so most experienced sellers avoid paying to work with suppliers because they will not have product offerings you can succeed with predictably at scale.
There are plenty of great suppliers out there that will work with you because of the money they can make selling you products and not fees they can charge you.