If company's work will be easily copied and sold better with high budget marketing, then one will rarely bother to create such a good product.
Alternatively, if their code can be used by competitors then it incentivizes them to continue to develop and improve.
Then I, a rich guy, hired some developers, copied your code and with way bigger marketing budget, released a product built on your code and somehow because of our bigger budget, we managed to become more popular than you and finally took you over.
Then why have we not seen Microsoft Trezor or Apple Passport? These wallets are open source and anyone can clone them. It's not as simple as that. Do you want to buy a wallet from the people who developed and wrote the code themselves, or from the people who copied it verbatim?