Almost anyone would agree that a platform which allows any speech at all is a 'free speech platform' even if they don't agree with allowing certain kinds of speech.

Most people would agree a platform that allows any speech outside of socially accepted exceptions (e.g. threats of violence, slander) is a 'free speech platform'.

But for people who are largely not allowed to share their views (rightly or wrongly) a platform which is heavily moderated for ideological conformity can also be a 'free speech platform' if they agree with the ideology, because they are free to speak all the speech they want to speak and are prevented from doing on other platforms. It's pretty clear that Parler falls into this category.

I guess the point I was trying to make is whether or not Parler is moderated to me seems irrelevant to the permissibility of this action.

How do you do that? I've noticed lately that HN commentary (at least in threads like this) has trended increasingly pro-censorship[1] lately, and it's pretty disheartening to read.

Would rather do something like what you say, but I'm not quite sure what you mean.

[1]: Which is a bit ironic, thinking about it.