Honestly, I ran TheGrandBitcoin with an investment of $30 and rolled more than 250 BTC in 5 days only, and of course I didn't spend any money in advertising, translations etc. Pretty lucky I would say loool
I gues if we would add something like "we are a professional team of arbitrage traders, who don't know what to do with their btc. And we will double your bitcoins guranteed in 100 hours... and so on" Probalby, we would role thousends of bitcoins now. But our intention was not to collect as many coins as possible, it was more to implement a long term doubler, that is honest from the beginning about the operation system.
Btw 30$ wont even cover the server.