Honestly it baffles me how many reputable sources cited that rumor. Anyone with basic math and common sense would know that $25 million is a ridiculous amount to spend upfront on promo for an album. At $15 per album, ARTPOP would have had to sell nearly 1.7 million copies just to sell $25 million worth of albums.

(And we know that ARTPOP was sold for less than $15 in some places

)