Sometimes there are those who only think copywriters write sales letters. There's lots of other ways to influence online buying.
Lots of different opportunities out there.
If you're looking for a little inspiration, you might want to check out this site. There's also job opportunities posted.
I don't have any affiliation with the site but there's some good ideas in some of the portfolios...and yes there's a lot of ideas that can help you with your online marketing.