Safemoon is one such smart contract-based token. It does not have its own blockchain; its supply is managed by a smart contract on Binance’s in-house blockchain.
Combining the BSADF with the GSADF test allows the r2 value to vary while still using a backward expanding window. r2 starts at the smallest possible window size, and moves one point at a time towards the end of the time series.

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In fact, every newly created blockchain copy comes with a two-part monetary reward: a fixed number of newly minted (“mined”) cryptocurrency units, and a variable number of existing units collected from optional transaction fees — typically less than 1% of the transaction value — paid by buyers.