A notable detail - Trading View changing layout - BTC/USD pair

Dear Friends,
sometime ago, around a month or two I noticed that BTC/USD pair disappeared from the layout of Trading View landing page. Today I saw the pair returning to the screen. Whether it depends on an ad being payed for (by some exchange, maybe) or decided upon some other external variable - still an interesting little detail I felt like sharing with you.

p.s. Gazprom is shining on the screenshot just for fun ;)