I really hope they don't, they have a crappy memory and cpu hog client which takes an age to start up, a very questionable privacy policy and monetization method, and their software just annoys me. I don't want my programs to spam memes at me.
I haven't experienced those issues with the client (on iOS or Windows). What's wrong with their privacy policy as compared to other chat services? Same question for monetization. And I don't understand the memes comment.
Isn't their "native" desktop client an Electron app? Because if so, I think that's where the resource usage concern comes from. (And rightly so! I still can't get over the fact that Slack on my work laptop weighs more than Emacs.)