I care about precisely none of twitters walls, and will in all likelihood continue to misname and disregard them at my leisure.

> since you don't have to pay anything

Rule #1 of Web 2.0: if you aren’t paying, you’re the product. Time, attention, data collection.

So sure, I don’t pay for Twitter.

And cattle don’t pay for pasture.

It's still a "walled garden" even if its free.