Oh, it's mostly because I'd rather keep communication to 1 social media. It's hard to keep track of itch comments and other social media. I'd prefer to have everything in one place that I can keep track of :)
Completely understandable, goodness knows I have problems with keeping login info for even so few as 5 or less different things organized or even remembering them. The less said about how frequently I check my email the better XD. Quite frankly I have a bet with myself for how long it will take me to forget my username for itch.io. If your wondering the odds are set to forgetting it around 1 and a half to 2 weeks of not logging in. So yes, I totally get the desire to keep things in one place. I think my personal hell would be trying to live like those people that login to 20 or more different things a day. The amount of usernames and passwords... I'd either have to keep a physical list or just lose my sanity and/or throw my computer out the window in pure frustration.