If the sprays do nothing I'd be surprised, one of the Nash bug spray smells just like squid boilie flavour, I'd confidently say it is just that, but could be wrong. Nah
Does it do anything, well the zigs still stink when they come back in maybe 12 hours later and all my zig bugs still stink years later.
Squid's a strong smell it lingers fact.
I'm more confident on a sprayed zig than I would be using plain unflavoured foam.