AdBlock Plus has been dumped from the Google Play store, as has at least one other ad blocking app.

FORBES: AdBlock Plus Dumped From Google Play: Not An Entirely Surprising Move

However, unlike polystyrene, it goes away once it has been dumped.

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While anyone can still visit the site for free and check their email address or username, users can also pay a dollar a month for a service that emails them an automatic alert if their account data has been dumped by hackers on the Web.

FORBES: With 12 Million Hacked Users' Data, Pwned List Launches As A Breach Monitoring Service