Earlier quoted context omitted.
im not sure the "amateur" needs changing, it could be used to point more users to middle tier, we have something like that, where we call our first tier something that like that, and the second "smart" and people take the second one. also there is a decoy effect. we push our middle tier like that without "fake" most popular tier badge. we don't have a free tier.
Amateur, at least in common American English, is virtually never used in a positive or neutral sense. It should definitely be changed in anything marketing-related.
It's neither positive nor negative most of the time.
Context: I've lived primarily in the Midwest and the East Coast, with a few years spent in New Zealand. I've also been either involved in or peripheral to a few hobbies that style themselves as "amateur X."