Welcome to pherotalk
This is all you need to know about pheromones 
https://pheromonetalk.com/t/an-introduction-to-mones-names-size-strength-use-effects-length-of/43003
As for receiving a GC, dfredi summed it up pretty well.
Have a look at men’s journals over hereto learn more about their experiences, and if this stuff really works or not.
You should start by ordering to-go bottles, in which the Gift certificate would help you with the expenses for(sometimes it covers the whole purchase), and try them out.
For a married man, I would suggest IH for a deeper bond and TUTH to spice the night time activities
God bless
Joe