I had made an native English check before proof reading of my article. The native check company had changed all "i.e.," and "e.g.," to "i.e." and "e.g." in the article. When the publisher made an English proof by themselves they changed all "i.e." and "e.g." to "i.e.," and "e.g.," in the final article.
Now I am wondering which is actually always acceptable. This may be an duplicate question of Should I always use a comma after "e.g." or "i.e."? But I found that it varies from publisher to publisher depending on the style they use.
So my question is why does it vary in different English writing styles. What are the differences? What's good or bad whether or not use a comma after i.e. or e.g.?