so why don't you explain it, in detail ? or post a link that is not just pro-BTC.
Simple: if you are a miner your hardware can only run one piece of software at one time. If you run Bcash software you will (hope to) create some coins if you are lucky: those coins will be Bcash. And NOT some other coin like Bitcoin or Litecoin. No! Bcash software will only create Bcash coins.
So Bcash and Bitcoin and Litecoin are all DIFFERENT coins with each its own
software and features. One of its features is Limited-supply: Bcash and Bitcoin both have 21 mil, Litecoin has 84 mil. But Ethereum for instance has no programmed Limit: it will grow for ever (so not so much suited as store of value).
Now you might think: why did old Bitcoin holders get so much free Bcash when that coin started its existence?
Well, normally Alt-coins are created with new software and features and
no user-base at all. It's hard to get a user-base and market the new coin. Normally coin-developers pre-mine to finance its marketing. When done well and the coin really has some good features it can become a success, but changes are very slim.
It's just much easier to copy (fork) a whole block-chain (what Bcash did) to get a huge user-base. So Bcash has other software (features) but has its user-base copied from Bitcoin, but it could just as easily copied the Litecoin-blockchain to get all the users from that coin instead.
It's all a free market: supply and demand will determine what a coin is worth. It doesn't matter how the coin is created or copied: what matters is its user-base and how much
they value their coin. Bcash has just as many original users as Bitcoin, but still it's only about 10% valued. Just because Bcash's features aren't what Bitcoin is (or might be) offering.