Gemstra

Positives
Social Selling: Gemstra’s main advantage is that it creates a social system where buyers, brands, and merchants can conduct business. This makes it easier for users to get their desired products through working with their system.
Brand Incentives: Companies with an established brand will be able to thrive using Gemstra. The platform allows brands to create sales and profits by integrating their product catalog.
User Incentives: Buyers who use Gemstra’s platform find it easier to find their desired goods. Since Gemstra’s token is cheaper than ETH, it allows them to buy their favorite products at a reasonable price.
Negatives
Scaling: While it sounds like a robust platform, we’ll have to see how Gemstra’s servers will hold thousands of users. If its able to do this, then it will have the edge over the competition.
High Competition: Since Gemstra is related to the social selling industry, it’s placed in direct competition with social media networks such as Facebook, Twiter, Instagram, etc. Other ICOs have decided the same thing.