I now actively avoid Pinterest links.
That banner is user hostile and makes me not love Pinterest. The experience on mobile is worse. There's bizarre behaviour where an appstore link can seize focus. You're in Chrome, browsing the WWW, and suddenly Chrome minimises and the app store opens. Pinterest does this and it is horrible behaviour.
If you install the Pinterest app you get asked if you want to open the page in the app instead of your browser.
I would use Pinterest everyday if it wasn't for that.
Which is not to say that the platform they provide, and the communities created on it, don't have value. It's just not enough to convince me to use it.
So it's like he grabs the mag from you, scolds you and then leaves the page you wanted to see open behind the counter where you can stand and squint at it for a bit if you like.
This is a fairly recent change to the site and I agree it's obstructive and intensely irritating. Imagine if Flickr were to do something similar? Clearly Pinterest want to drive further registrations to their site, but this seems like such a rude and intrusive way of doing it.
Pinterest is an excellent source of visual inspiration and research often overlooked by many designers and developers. There are lots of excellent boards that collect examples of website, app and tablet designs. There is also a huge variety of illustration and graphic design examples of every style and colour imaginable. However, the new restrictions they've placed on viewing content mean that I no longer recommend Pinterest links.