I've tried with and without VPN to the same effect unfortunately.

You beat me to it!  
.
But I was going to add that some of the "answers" are never really clear to me. I'm talking about the 4 x 4 grids with photos, not the blurry alphanumerics. "Select all squares with motorcycles" or bicycles or chimneys or stairs or traffic lights or ... whatevers.  
.
OK. But what if there is just a smidge of a motorcycle (handlebar tip; tiny piece of a tire; and is the RIDER a part of the motorcycle or not?) in the box? Is that a Y or N (plus or minus). Same thing about bicycles, cars, chimneys, stairs [does the side face of a stair count or only the step and riser?], ...)  Are you supposed to click on a smidge? For example, in the attached image, there are traffic lights in the top row:
-  + + +
-  -  -  -
-  -  -  -
-  -  -  -
.
But what if it asked for "cars"? Are you supposed to click on the box [?] with the smidge of a fender and a tire?
-  -  -  -
+ + + +
+ +  - -
+ ?  - -  
Should the ? box be + or - ?  Does the captcha want "zero vs non-zero" or "welllll, it's only a small bit vs clearly there."
.
Same problem with the sliver of an edge of a traffic light or a fire hydrant. And is a walk light considered to be a traffic light. (I'm a human in big cities where PEDESTRIAN traffic IS traffic. But does the captcha agree with me or am I answering it incorrectly?  
.
And there is also identity ambiguity. This came up in an old post (or was it a PM) with mrfisher. There are chimneys and there are vents (flue vents). Vents are not chimneys. I know that. You know that. mrfisher knows that. But do the captcha bots know that? Am I supposed to click on a vent for a chimney OR show them that I'm a human that knows the difference and not a bot that doesn't?

Dropping vpn on sites like this is a bad idea imo.  

Ter logs your ips.

It's not the VPN. I've tried without VPN (an equivalent of accessing the site naked through private channels internationally) and it's the same thing.