Ethereum
The substrate. For the chain the Family builds on, see Robinhood Chain.
Ethereum is the execution environment every Family project is written against, whether or not it settles there. Its virtual machine, account model and ETH denomination are the vocabulary; Robinhood Chain is one of many places that speaks it.
The Family's relationship to Ethereum is that of a dialect to a language. Nothing here is a departure from it, and nothing here is possible without it.
What the Family takes from it
Everything structural. Contracts are EVM bytecode. Balances are wei. A wallet is a keypair that signs a transaction the same way it would anywhere else, which is why a person can arrive at a Family surface with the wallet they already have and be finished in one click.
This is not a small inheritance. The reason the Ponspedia machine can say your wallet works out the network fee and leave it there is that the wallet genuinely does, using machinery nobody in the Family built or maintains.
The fee problem
A draw that dispenses six tokens is not worth a network fee larger than six tokens. On a congested fee market the machine stops being a machine and becomes a demonstration of a machine — technically correct, practically pointless.
This is the whole of the Family's argument for settling elsewhere. It is an argument about denominations, not about ideology, and Family writing is fairly consistent in refusing to dress it up as anything grander.
The wei convention
Family surfaces quote ETH to six decimal places, which is far short of the eighteen the unit actually carries. The convention exists because six places is where a price stops being a number a person can hold in their head and starts being a hash.
The machine charges 0.000500 ETH for a spin and 0.000100 for the draw. Both are exact at that precision. Nothing is being rounded away from you.