[sofaofthedamned]

" we have addressed the issue that allowed this to occur and are no longer using phone numbers or email addresses collected for safety or security purposes for advertising. "

Does this mean the matches they've already made on these identifiers are still active?

[itronitron]

Any advertiser that made the match previously will likely have that stored somewhere and will also probably have that identified with the twitter handle, so yeah those identifiers are still active, just not within Twitter.