I know you can always win with just couple of tickets because after all its luck based but its just not to my taste. I'd love to win but I dont think I will ever so I'd rather take those guaranteed prize of 5k. Its just a matter of personal taste though and Im pretty sure most people will go for the 50 golden tickets because thats literally worth 0.0125 btc
Btw, your chance to win the lambo with 50 golden tickets is around 0.006% and this is with the current total tickets amount.
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.
So this is a mutual thing for both the gamblers and the casino, the gamblers end up not doing anything special and just gamble, and the casino gets more wagered, everyone is happy. If you end up focusing on it though, and end up spending so much money, like let's say buy 500 golden tickets, the chance of you losing is still 99%+ easily and you are paying so much to have such a low chance.