Is the cover of an ebook important when it comes to sales?

I've read where authors say it is important. From my own limited experience, I don't know.

At present I have 3 ebooks published. Two of which have covers I have paid somebody to make for me. I think they're good covers compared to the generic one from Amazon I'm using for the other book. BTW, I'm going to get another cover done for Coming Home
.

However of my three books, Coming Home is the one I'm selling the most of. By a big margin too. My next book will feature a paid cover also. A raunchy cover for a raunchy book. It will be interesting to see if it the losing streak I have with paid covers.

Tomorrow marks the end of one month(I published Coming Home on April 1st) of my selling ebooks. While I'm not making $1,000 a month like Katie Leone, right now I estimate will be within ten U.S. dollars one way or another of $300 in Worldwide royalties. I guess there's a market for TG fiction stories about soldiers coming home, cannibals, dung beetles*, Ground Hog Day like plots, lesbians*, and other assorted topics I write about. Either that or I got lucky this month.

* These books aren't published yet but will be in the next 5-7 days.