@OP, as far as I understand, Aleo is still in its testnet phase and is not yet fully launched on the mainnet. Therefore, I am confused about how zionodes are offering mining services for Aleo on the mainnet through their infrastructure. I did a quick check on Aleo's official Twitter account and couldn't find any information about any cooperation between Aleo and zionodes. Have you thoroughly researched and verified if the mining services offered by zionodes for Aleo on the mainnet are legitimate and trustworthy?
Yes, Aleo is still in the testnet phase, and mining it entitles you to 'credits' which are later converted to aleo coins after mainnet launch. Zionodes is definitely trustworthy because they are a listed pool (under proving pools) in Aleo's official discord server as well, and I already have leased out about 50000 c/s with them. Besides, I have been mining Bitcoin with them for over a year and have never encountered with any issues related to pay-offs.