Why are people saying that Lemmy is free of corporate interest?
Can’t a corporation just enter the space whenever they want to? Can’t they start or even buy out larger instances? Even if Lemmy does take off, wouldn’t this inevitably happen anyway if the space gets popular enough?
They can - but everyone else can choose to defederate from them. It gives others choice of whether or not they want their instance to participate (or let another instance) participate in their activities.
And then if you as a user don't agree with how the admins are running the instance you're a part of, you can make a new account under a different instance with admins that run that instance differently (i.e. by federating with corporate platforms).