Open the link in a Private Browser window. This will prevent the site from reading your cookies, so it will not know how many articles you have read. Either that or find and delete the relevant cookie.

get the "self-destructing cookies" plugin. it is also one of the best mechanisms to protect your privacy

I don't see any paywall, maybe is location-related. Anyway, do a `curl termbin.com/olua | less` and read it freely (1 month lifetime).