You either earn tokens as rewards for activities that contribute and build the community, or you can buy tokens on the Uniswap decentralised exchange at the WPOL/OPEX Pool.

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https://app.uniswap.org/explore/pools/polygon/0x2E8aE39814879eacb2b3C72648f28563b624aa19

 

You will need to have WPOL ( Wrapped Polygon ) tokens in your wallet in order to swap them for OPEX tokens.

You can buy WPOL or POL Tokens with US$ on a centralised exchange such as Coinbase or Binanace or buy directly into your Metamask waller using credit card.

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For more about how to buy tokens on Uniswap see: 

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https://blog.uniswap.org/web-fiat-on-ramp

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