Your expanded idea of free speech is noble but it's not possible for society to provide.
Free speech allowed by the government is possible.
Free speech hosted and paid for by private commercial entities is impossible -- in any long-term sustaining way.
The "free speech on commercial entities" would require 2 extra draconian laws that citizens would never agree to:
1) a law to force private entities to pay for speech they disagree with on their private platforms and in their private conferences even if that opposing speech causes them to lose the funding that allows for them to pay for it in the first place.
2) a law to force web surfers' eyeballs[1] to view content they don't agree with, and force people to buy tickets to conferences with speakers they don't want to hear
Free speech with private commercial entities creates a contradiction of priorities. I've written about this impossibility before.[2]
To make it relate to HN readers, imagine after creating a Digital Ocean account and paying $9/month for VPS to host a blog about photography or enthusiast forum about cars, you must now pay for opinion pieces about Trump or Clinton (whichever you disagree with). The draconian law requires you pay for it because nobody's opinion is allowed to be marginalized. Also, the web users visiting that new site are required to show video proof (maybe via iPhone/Android camera) that they've read the marginalized opinions. (To satisfy the proverbial "if a tree falls in a forest and no one is around to hear it, does it make a sound?" ... if no visitors go to the web page and read it, it's effectively not free speech.)
[1] Ludovico technique: https://en.wikipedia.org/wiki/A_Clockwork_Orange_(film)#/med...