I'm not talking about advertising through some kind of "media"
Advertising is advertising, by whatever means. Doing it by 'financial inducement' might be deemed to be the worst kind by the authorities.
The money you take is only to share the cost to have some fun together. In this way I use to pay 50% of the overall cost and pax
Yeah, have some fun together,
and for you to get financial reward for flying complete strangers. I think you will find that the exemption granted for 'cost shared' flights are for the cost to be shared equally - amongst people you know.
Your 'freebie' is completely different, as it is a blatant financial bribe to people you only met last flight (when you charged them as complete strangers to fly), to get them to drag along more complete strangers to subsidise your flying costs.
Look mate, it isn't me you have to convince, it is the authorities. You know full well that you are charging complete strangers for flights when you clearly stated:
tell him it will be FREE (just for him) if he finds two paying passengers.... In this way you get in touch with more people and the free passenger (call him copilot, works better) will be striving to find people paying to fly.
To me, it looks cut and dried. I feel sure any authority would see it the same way. That you hope to be a commercial pilot, then you advertise in a public forum of professional pilots that you are doing these illegal flights seems rather short-sighted.