Netflix has introduced a new type of extra member account: extra members with ads.The streamer announced the new offering in a shareholder letter on Tuesday before its fourth-quarter earnings call. In the US, according to Netflix's help site, adding an extra member with ads costs $7 per month, and the option is available alongside the pre-existing extra member accounts that do not have ads.Per Netflix's site, these extra member accounts work similarly to the previous version as a way to pay more for an additional person located in a different household. You'll need an ad-free type of Netflix -- either Standard or Premium -- to purchase an extra member slot. Netflix Premium subscribers can add up to two slots, and Standard customers get one. Extra members have a separate account and password.Netflix also announced price increases on Tuesday. Now, the ad-based extra member version costs $1 per month less than the Standard with Ads plan and $2 less than an ad-free extra member account.Other than the price, a difference between being an extra member with ads and a Standard with Ads subscriber is that extra members can only watch and download on one device at a time. Standard with ads members get two simultaneous screens and devices for downloading. Extra members get one profile, and Standard with Ads customers get up to five.In the shareholder letter, Netflix said it aimed to give members "additional choice and flexibility" with the extra member offering. Ad-supported sign-ups accounted for over 55% of sign-ups in Netflix's ads countries in its fourth quarter, according to the letter, and ad-based membership grew close to 30% quarter over quarter.