Or just not offer other EVs use. Winner.
Or Tesla just not go asking the EU/UK grant money from public taxes to install proprietary charging stations.
Governments all over Europe have been incentivising the public to purcahse more EVs. Part of that includes offering charging companies grants to install PUBLIC charging stations so the public will see that EVs are viable. Tesla thought "this is free money" because we already have a large network of charging stations and making them open to all EVs = instant grants.
It really does come down to profit and it was worth more for Tesla to get access to these grants by opening up their already existing charging stations. Elon thinks, wait you mean we can get 10s or even 100s of millions in grants and all we need to do is allow Joe public in their non Tesla EVs to use our already existing charging network?
Wow free money, were do we sign up. Winner