Last time I tried to look up a quantity of addresses in Scotland - at https://osg.scot/portal/
After the first few, I got one of those graphical CAPTCHAs. Then a little later, two. Then, four, then eight... then I took a long break.
(This is for address data that I already have - to check it.)
This was inconvenient but I respect the goal of preventing data from being ripped wholesale. And I suspect that the results don't need to be 100% correct, and that I'm scored against other human players, not against a computer recognizer... or there would be no point.
I do think that the pictures are faked anyway because surely American streets don't have that many signs all over them... even in famous small towns which have peculiar traffic regulations specifically to earn fines from unsuspecting visitors.