I mostly listen to HPR with AntennaPod on my phone. 

I mostly comment on my laptop/dedktop. 

I am almost daily on Mastodon, from my laptop/desktop. 

I dislike to write and read on phone, I ptefer a real keyboard and big screen. 

However, this particulat comment: I listen on AntennaPod on phone, in AntennaPod I click on Open web page, Firefox starts and opens the page for this episode and I type. 

I don't think it would be much easier to give it on Mastodon. 

Having said that, each person has its tools and way of working. And I agree Mastodon is good to tell about and promote HPR or specific episodes. And I don't mind if comments on web page and Mastodon will sync (but longer comments will be truncated on Mastodon).