a privilege, a special right or benefit

premium

member, a person who is in a group / participant, attendee at an event / (programming) member in object-oriented programming / (Internet slang) suspect in a crime

be limited to, be restricted to / restrict

not always, not necessarily

There is nothing better than ~ / ~ is the best / Nothing beats ~

to be limited to

elevated price of a product (compared to other products of the same sort)

(sports) member of a starting lineup

lurker (in an online community) (abbr. ROM, ロム)