Actually, Thailand doesn't care what country the tourists are coming from: Unites States, Canada, Russia or China. As long as they are bringing the money to the country.
The highest of tourism receipts in 2015-2019 was Russia and the average spending per Russian tourist in 2019 was 70,000 baht (2,250 U.S. Dollars) per person, per trip.
https://www.scmp.com/week-asia/people/article/3203078/russians-fleeing-ukraine-war-seek-refuge-thailand-boost-tourism-property-investments
Factors Affecting Tourism Demand of Chinese and Russian Tourists Traveling to Thailand