On August 28th, Doubler Protocol, a crypto investment strategy protocol, announced in X that Doubler Pro will officially launch Arbitrum on September 1st. In addition, Doubler Protocol will launch a "liquidity airdrop" campaign specifically for the Pro version. The rules of this liquidity airdrop will be consistent with those of the Doubler Lite liquidity airdrop. The airdrop provides at least 100,000 DBR, and the creators of the first 500 eligible mining pools will receive rewards.