I think Marriott is the only program that truly protects Platinum. You can't cheat your way into 75 nights, but you can hotel hop with Starwood/Hilton/Hyatt. (Hence me jumping ship from Marriott).

I don't think by making me a challenge like 12 nights in 2 months would be diluting PLT status in any case. If I'm capable of doing that in 2 months, I wouldn't imagine that 25 in 6 times that length would be all that hard. The real culprit is the double stays , which no doubt I'll be whining about once I'm a PLT by March like the rest of you guys .