I really don't think "AMP Radio" would kill off Pulse 87. In a backhanded way, if an AMP plays some dance music that is on Pulse's list, it may actually HELP!
The one thing about the Pulse 87 audience is that they mainly want current based rhythmic (dance) music being played on there and very little outside of that. Pulse fans don't necessarily want to hear Taylor Swift, All American Rejects, The Veronicas, Flo Rida (unless it's a remix), Kelly Clarkson, etc. And Z-100 is certainly not playing Flanders, Nicola Fasano, Kim Leoni, and unless I'm mistaken while they do play Lady Gaga, it's the standard version...not a remix.
Basically if Amp does add a few (keyword: a few) current based dance tracks that Z isn't playing (nor 'KTU) but Pulse IS doing, that could get the younger demos into dance music and figure, hey Amp is doing this....what could Pulse be doing since Pulse does go deeper into dance and would have material that the Pulse audience wants, but not necessarily work on an "Amp".
Z-100 could never really do that because they have to "protect" 'KTU's base unless a
dance track is SO big, such as when David Guetta/Chris Willis had "Love Is Gone" on rotation, that it could not be ignored. Yet Z-100 has been such a strong station all these years with no DIRECT competition that in order to compete, something different has to happen. And as long as Z doesn't touch current based dance all that much, that is where an Amp could get in. But at the same time still keep to a CHR identity but add a few dance tracks. To that, it won't knock Pulse out because the audience for Amp would still want the CHR that Z-100 does. You're just giving them a little more