They were for a new paid membership, that I think was $75 USD annual? A main advantage was that a paid subscription gave you the option to disable all advertisements.
But when my membership came up for its first annual renewal the automatic debit failed, because I forgot to submit the new card numbers I got when my previous plastic was lost. I didn't know it until the ads suddenly appeared and I couldn't turn them off.
So I had to start a brand new subscription, which got me another RJ shirt. But the next year RJ made all memberships free, and the shirts became history.