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It is like Instagram, but people vote for your content and you receive the crypto SOL in return. I made a review on my crypto blog: https://chesatochi.com/sola-ai-review/

1 sol = how Usd ?

The token has not much value, for now, the ICO has finished in December and the team develop the product at the moment.

You can track the value here: https://www.coingecko.com/en/coins/sola

Also, you can trade the token on Tidex and two others decentralized exchanges.