Just seen this

Get a return for price of single if paying by paypal.
Hoping to use this for my first trip , assume it means DME-city and return is covered as it only mentions city-DME

https://aeroexpress.ru/en/press_rele...s20090637.html

The discount is valid for return tickets purchased from the website.

Aeroexpress, together with the global operator of online payments PayPal, is launching a campaign called A Return Trip with PayPal. Participants will be able to buy return tickets (one journey to the airport and one trip to the rail terminal) for only RUB 420. To receive a 50% discount, passengers shall purchase a Return Trip with PayPal ticket at www.aeroexpress.ru and pay for it using the PayPal service.

“Every year we record increasing popularity of electronic sales channels, so we try to offer our smart passengers the most beneficial conditions,” says Valery Fyodorov, Chief Operating Officer of Aeroexpress. “Our joint campaign with PayPal offers our passengers, who are used to planning their trips in advance, the opportunity to purchase two tickets for the price of one and not worry about the security of their online payment.”

It is worth recalling that one return ticket costs RUB 1,000 when bought from ticket offices, TVMs, ticket sales clerks, or at the turnstiles using the Pay@Gate service. One can obtain a 16% discount (the price would then be RUB 840) when purchasing a ticket via the website at www.aeroexpress.ru or via the mobile app. Return tickets are valid for 30 days from the date specified on them.