I don’t know duplicate titles affect gigs rating or SEO. But i think it should not be duplicated.
My gigs were going down from few weeks. I searched in Fiverr and saw there are many new gigs with same name.
And it can be one of the reason that my gigs start loosing impressions.
I changed my gigs title to see the results and impressions start increasing.
I start getting messages and orders too.
Is there should be any rule to not duplicate the title? What you think mates?