I’m not even familiar to blast.io but both of them surely sounds like a ponzi scam since there’s no way to yield the deposit amount while getting airdrop at the same time. Who’s generous startup project that will give this kind of benefit by just completing minor task while sending a deposit.
This is not an airdrop but rather a different form of scam token sale. There’s no airdrop that will require someone to deposit on the given address because airdrop shouldn’t involved any deposit but rather just task.
Really it looks out of the ordinary to achieve such level of profits just by depositing for the airdrop and the major turn off for me in this is the fact rhat, airdrop participants will have to deposit before being able to claim the airdrop rewards from the platform.
And just as you mentioned the project looks and sounds like a Ponzi scheme and anyone looking to take part in it should do that with caution on the long run, because when it looks too good to be true rewards it is definitely not true in most cases.
Most especially when emphasis is made on the initial deposits before claiming the rewards or activating those rewards.