It is highly expensive and competitive to focus primarily on the primary keywords. Dedicate at least a portion of your strategy for Amazon PPC optimization to identify the new long tail keywords in a consistent way. These are less competitive and economical and hence are much easier to rank for.
Startups saw a 108% growth in funding last year and created more than 40,000 new direct jobs and three fold increase was seen in indirect jobs. Though these are positive signs going ahead but we are far away from our goal.