First visited there in the late 1960s when there was no visitor centre, no restrictions: all at your own risk.
Then there was the film "Ryan's Daughter" (1970) which no doubt increased the footfall enormously.

Back just a few years ago, and yes, visitor centre, and pay to visit: didn't see any buskers though. Missed my opportunity, maybe?

Sad that a young woman lost her life there just a few weeks ago - fell while taking the obligatory selfie. Not the first by far - 66 deaths there recorded between 1993 and 2017, many of whom were tourists.