They haven't learned anything from the succes of ALLC/Rubberneckin'. Those hits proved (and should have learned BMG) that the mature Elvis (post '68) can score with songs that haven't been hits during his life.
Until then BMG/RCA always thought that 'once a hit, always a hit' strategy was the only possible one. So they kept releasing compilations featuring setlist of his bestknown tracks, with artwork featuring pictures of the young Elvis.
"Unfortunately" this huge success of the 18 #1's in the UK might be an indication for BMG that their old "once a hit, always a hit" formula is still working. But they -as usual- forget that the ALLC/Rubberneckin' success was because it was a fresh/new/unexplored market, while the 18 #1 singles is sold to the same target that they're selling most of their releases to: the normal Elvisfans.