Bitcoin (BTC) rewards shopping app Lolli has expanded its business by adding major booking service Hotels.com to its partners, the company announced in a blog post on June 25.

With the new partnership, the New York-based firm now has two of the world’s top three travel websites including Booking.com and Hotels.com, Lolli said in the announcement, citing data from traffic analytics service SimilarWeb.

Founded in March 2018, Lolli allows users to earn Satoshis (sats), the smallest unit of bitcoin currency worth of 0.00000001 BTC, while shopping online. The firm claims to be the first bitcoin rewards application with over 500 brands as partners, including flagship brand of American global hotel service Hilton, as well as Marriott, VRBO, and Priceline, among others.

Following the partnership with Hotels.com, Lolli now enables global travellers to earn up to 3.5% bitcoin back from purchases on the website, the company said in the announcement.

Hotels.com is a major online accommodation service listing more than 325,000 properties in about 19,000 locations over the globe.

Prior to the announcement of the partnership, Lolli initiated a giveaway quiz on Twitter, promising to give one million satoshis, 0.01 BTC (around $100) to the person who first guesses the new partner.

Back in November 2018, Lolli raised $2.25 million in an oversubscribed seed round from investors including Digital Currency Group.

Bitcoin is no stranger to the travel industry, however. Cheapair was one of the first to accept BTC in 2014. More recently in April, United Kingdom’s largest travel management company Corporate Traveller announced it will be accepting bitcoin for payments.