Matthew Poole and continuators on 1 Corinthians 5:10

10 Yet not altogether with the fornicators of this world , or with the covetous, or extortioners, or with idolaters : for then must ye needs go out of the world .

I did not intend that admonition as to such persons as were no Christians, no Members of the Church. (So this term World is used, Ioh. 15.19. & 17.14. and so it is to be interpreted here)

he extendeth this admonition to other scandalous sinners, such as covetous persons, by which he understandeth such as by any open and scandalous acts discover their too great love of money, whether by oppression, or by cheating and defrauding, &c. or Extortioners, such as exact more than their due; or with Idolaters, by which he understandeth such as worshipped Images; and under these few species of scandalous sinners here mentioned, the Apostle understands all others alike scandalous.

For (saith he) you could have no commerce nor trading with men in the world, if you might keep no company with such as these. Which is true at this day, when the world is much more Christianized, than it was at that time.