Are these 433Mhz receivers likely to be able to physically receive signal from this?
if transmitter transmit at 433mhz and at same channel, then those receiver will receive those signals but along with noises, you need to separate those signals from noise, if those switch produce just two  commands on/off u can try to decode, if it transmit each time new signals(commands encrypted each time with different key) then u can't....u can build ur own transmitter with less time then trying to decode those signals