XRP Ledger
What is locked: the owner reserve, about 0.2 XRP per trust line or offer.
It comes back when: the trust line is removed or the offer is cancelled.
Ashback: not yet. No date.
Coming soon: more chains
On Solana, empty accounts hold a deposit that comes back when they close. Other networks lock deposits too. Ashback will bring the same report and cleanup there.
Stellar
What is locked: the base reserve, about 0.5 XLM per trustline or offer.
It comes back when: the trustline is dropped or the offer is cancelled.
Ashback: not yet. No date.
Algorand
What is locked: the minimum balance requirement, about 0.1 ALGO per opted-in asset.
It comes back when: you opt out of the asset.
Ashback: not yet. No date.
Cardano
What is locked: the min-ADA value, about 1.4 ADA or more per output that carries tokens, rising with their count.
It comes back when: the output is spent and its tokens are removed or gathered into fewer outputs.
Ashback: not yet. No date.
Sui
What is locked: the storage fee, about 99% of it refundable.
It comes back when: the object is deleted.
Ashback: not yet. No date.
NEAR
What is locked: the storage staking deposit, about 1 NEAR per 100 KB of stored data.
It comes back when: the stored data is removed.
Ashback: not yet. No date.
No deposit there, but a report helps
Ethereum
Ethereum and its family: BNB Chain, Base, Polygon, Arbitrum.
What is there: no locked deposit; keeping an account costs nothing.
What hurts: token approvals left open to contracts, and junk tokens sent to bait you.
Ashback here: a read-only report of open approvals and junk tokens.
Ashback: not yet. No date.
Bitcoin
What is there: no locked deposit.
What hurts: small unspent outputs that cost more in fees than they hold.
Ashback here: a read-only report that shows them and the fee level at which gathering them pays.
Ashback: not yet. No date.
More networks are being studied.