That's totally false. Metacritic will assign scores even where the publication does not use number scores.
"For each review found, we will take the score given by the critic and convert it to a 0-100 point scale. (For those critics who do not provide a score, we'll assign a score from 0-100 based on the general impression given by the review.)."
https://metacritic.custhelp.com/app/answers/detail/a_id/1495/session/L3Nuby8wL3NpZC9DOFVxQkczaw==
The
true reason why your reviews are not included in Metacritic is probably the following:
"Several other websites that provide links to movie reviews have weighed the quantity vs. quality issue and come out in favor of quantity. These sites typically include links to as many reviews as there are available on the net. And lately, with every Joe Schmo posting a movie review both before and after movie releases, there are quite a few reviews for each movie (we're talking 100's of reviews for the more popular titles).
True, some of these Joe Schmos--or at least the Harry Knowles--do have quality sites with useful reviews and information. But the quality of many is inconsistent at best... Thus we felt that selecting a modest number of higher-quality publications would make the pages of the site easier to read and would maximize the quality of our information."
http://metacritic.custhelp.com/app/...ession/L2F2LzEvc25vLzAvc2lkL3FBVUpRdGRr/sno/0