Forza has a competition in Toronto that has a 20k grand prize (I think the organizers put on a GT tourney in Canada a few years ago). That's more than anything GT can offer me right now. I'm probably not quick enough to actually win that, but I'd much rather take part in that, instead of competing for some random FIA points. But that's just me.
Everyone is free to choose if they participate in FIA. However, if you participate and you are among the top x in your region, you’ll be invited to the Finals. The selection process is fair and there is no need for random contestants as some people seem to propose.
I don’t see any relevance to the prize money and am not sure you actually wanted to reply to what I wrote. Perhaps you have misquoted.
If you prefer to do the Forza event, Godspeed to you. I’m way to slow for any kind of competitive driving event anyway.