I believe that nobody should be focusing mainly on the golden tickets, like if you love gambling and gamble a lot and get tickets because of that? It is totally understandable and that's great, you are paying your 5% house edge fee with that anyway so it is totally understandable, and I am sure freebitco.in saw a huge surge in gambling after the lambo thing, or at least on the first one or two, because they wouldn't keep this going and give away 200k dollars every 6 months if it was a big loss for them.
Of course, getting golden tickets shouldn't be the main goal for gamblers. Also, I guess the Lambo lottery isn't a big loss for FBC because there were 2.89 mln golden tickets in the previous round of this lottery. Correct me if I'm wrong, but it means that FBC got ~720 BTC for these tickets due to house edge.