Tech Biz Replay: Amazon RELENTS On Ads, Yelp SURVIVES Expiry, Inc. (NASDAQ:AMZN) says that, for an extra $15, it will permit buyers of its latest Kindle Fire tablets to opt out of lock screen and home page ads. This latest step might be in response to its being attacked online for a previous statement that consumers would be unable to avoid the ads.

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Shares of Mellanox Technologies, Ltd. (NASDAQ:MLNX) tumble Monday, following word that its Chief Financial Officer Michael Gray is stepping down, effective November 5th, and will be replaced by Vice President of Finance Jacob Shulman. Gray has served as Mellanox’s financial officer since December 2004.

Pandora Media (NYSE:P) continues Friday’s slide, on a report that Apple Inc. (NASDAQ:AAPL) is developing a rival service. Shares fell again, even as Pandora released an adequate August audience metrics Monday, which indicated that its domestic radio listening share was 6.30 percent, up from 6.13 percent in July and the 3.67 percent posted in August 2011. Active listeners numbers were up 2.4 percent month-over-month, and up 48 percent year-over-year to 56.2 million.

Yelp (NYSE:YELP) shares edge up again, since its lockup expiration ended without top executives or venture capital investors divesting their shares. Lord Abbett has been aggressively snapping up Yelp. The latter benefits from hopes that a larger Web or mobile player will make an offer.

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