By Dawn Chmielewski and Lisa Richwine LOS ANGELES (Reuters) -Netflix Inc said on Thursday it will introduce a streaming plan with advertising for roughly $7 per month in November, a move to attract new subscribers after the company lost customers in the first half of the year. The $6.99 cost for the “Basic with Ads” plan is $3 less than Netflix’s lowest-priced tier without commercials. The new option will roll out in 12 countries including the United States, Brazil, Germany, Japan and Korea, over 10 days. Subscribers to the plan will see roughly four to five minutes of advertising per hour, Ne…