Google and the mobile carriers have long been at odds over mobile payments, but faced with the runaway success of Apple Pay, the two rivals have become friends. AT&T, Verizon and T-Mobile are selling their mobile wallet joint venture Softcard to Google for an undisclosed amount, Google and Softcard revealed on Monday in separate blog posts , and they have agreed to pre-install Google Wallet on their Android smartphones starting this fall.

That’s quite a full circle to arrive at, considering that for the last three years the three operators  actively blocked Wallet from their devices in blatant protectionism for their own mobile payments service Isis. The problem was that Isis, which changed its name to Softcard last year, was slow to arrive to market , meaning few Android phones had access to any kind of near-field-communications (NFC)–based wallet.

That left the nascent smartphone contactless payment market stillborn in the U.S…

You can now get discounts to physical stores simply by surfing Twitter.

The company has introduced “Twitter Offers,” which allow any retailer to turn a promoted post into a coupon. Once a Twitter user adds their credit card information to the application, they can click a promoted offer post and the discount will be linked to their card.

When they go to buy the product at the physical store, the markdown will automatically be deducted at checkout if they use the same credit card: no physical coupon necessary.

Coupons may not sound like the sexiest endeavor, but this is a substantial step for Twitter in the world of commerce. It’s a tool to woo retailers, the second in its arsenal after the recently introduced buy button , which allows Twitter users to purchase a retail product from a promoted post without ever leaving the application.

As Twitter mentioned in the blog post , the…