Ray Cyrus, one of the biggest country hits of the 1990s, was notorious in this respect, as was the fad of bro-country in the early 2010s) and, although pop/country crossover complaints have occurred since even the late 1940s with artists such as Eddy Arnold and Elvis Presley, the marketing of pop songs with little or even no country influence as "country" songs solely because the artists have previously performed country songs (something Billboard eventually confessed in 2019; modern examples of this include Taylor Swift and Carrie Underwood). The 1990 dividing line coincided with a change in Billboard magazine's rules for what was then the Hot Country Singles record chart. Prior to 1990, it had operated under a variant of the methods used to produce the Hot 100; singles sales were combined with radio airplay to rank songs on the chart. In 1990, through an affiliation with Nielsen Broadcast Data Systems, Billboard dropped record sales from the formula, basing a song's ranking solely on spins on country radio, weighted by a station's listenership. (The formula reincorporated singles sales, both physical and digital, in 2012, but included airplay on non-country stations, thus giving pop-crossover singles a major advantage.) The 1990 change had quick effects: a number of musicians who had had consistent success on the chart through the late 1980s suddenly dropped out of the top-40 by 1991. Although this 1990-era dividing line, to a certain extent, exists, it is not necessarily universal. "Classic" era country artists such as Kenny Rogers, Willie Nelson and Dolly Parton continued producing hits well into the 2000s that received mainstream country radio airplay (sometimes in collaborations). Other artists from the era that did not continue to receive wider radio airplay after their heyday maintained strong cult followings from fans of all ages; an example of this is Johnny Cash, who remains in high regard many years after his 2003 death. Artists that began their careers in the 1980s, near the dividing line of the classic/modern divide, enjoy followings among both audiences; examples include George Strait and Reba McEntire, both of whom (as of 2014) are still active and performing hit songs. Neotraditional country, a style of country that arose in the 1980s, continues to produce hit songs and artists that draw from the sounds of the classic country era. In part due to changing demographic pressures, "classic country" radio programs have begun adding 1990s music into