Providing the text or an archive link separately may be polite, but your request goes too far. If somebody shares a paywalled link that is on topic for the community, you have several options. You can ignore it and miss out, and be no worse off. You can find an archive copy yourself, and even share it in a comment to receive fake internet points. You can enjoy the discussion in the comments and maybe find other relevant links there. But you’re suggesting that the community is better off with fewer posts and less participation (“please don’t [post] unless”).

The community rules include

Posting a link to a website containing tracking isn't great, if contents of the website are behind a paywall maybe copy them into the post

That’s a much nicer way of stating a preference to have OPs do the legwork. Please don’t discourage community participation.