Nicholas Thompson, writing at Wired:
The algorithms that resulted were then tested on the one-fifth of the data that hadn’t been given to DeepText, to see how well the machines had matched the humans. Eventually, Instagram became satisfied with the results, and the company quietly launched the product last October. Spam began to vanish as the algorithms did their work, circling like high-IQ Roombas let loose in an apartment overrun with dust bunnies.