Glancing at a tag cloud is a great way to figure out what someone's blog tends to write the most about (the biggest tags) and what they write the least about (the smallest tags). I've been known occasionally to arrive at someone's blog to read some article, glance at their tag cloud and see maybe some other interesting topics they've written about---especially if it's one of the bigger ones---which I do click on and sometimes discover more interesting content on their blog as a result.
So yes, I've clicked on them. But not very often. But certainly "look at" more than I actually "click on", so there is still some value in these to some degree even if people don't click on them.
I just checked the site in question and it is not responsive. Being able to conform to screenreaders and older browsers is not difficult by any means and certainly shouldn't cost anywhere near even 1% of what we're talking about here. In my humble opinion.
A nice touch is the responsiveness that was put into moving the sign-in box from the vertical-middle of the screen on tablets and desktops, up to the very top of the screen on mobiles. Well done!
1. Where's the Login/submit button? I wonder if many people would expect this.
2. What do people think about when you enter your email address and accidentally enter the wrong password: should the next page have whatever email address you initially entered re-displayed? Because the error message (rightfully) doesn't indicate whether the problem was actually with the password or whether you instead typo'ed the email address, would having this re-displayed allow the user to more easily recognize their mistake? (i.e., seeing that you typo'ed your email address is more helpful instead of first thought being that you've forgotten/mistaken your password)???
If you push in the "Stick" button, changes are not lost if you refresh. It does also have a save button, but yes, you still need to upload the change. (Even though I tend to copy/paste instead of using this.)
But, this is---for me---a one time thing, after I've made all the changes I want and things look great. It makes the CTRL-S, Alt-Tab, Reload procedure that was originally described only need to happen once, instead of lots of times in rapid succession.
I'm surprised at how many people don't know about a feature they probably already have, found in the Web Developer plugin for Firefox. The Edit CSS lets you see your changes live as you type. I use it all the time.
So yes, I've clicked on them. But not very often. But certainly "look at" more than I actually "click on", so there is still some value in these to some degree even if people don't click on them.