If the profits are good then why not continue it.
Sure there are loses sometime but that doesn't mean that will happen again.
There are things that are needed to be risked just for profits and I see good ends with every investment in gambling websites.
Though you would also need a large investment to feel the profit.
Agreed, if you want to earn profit, you must risk something (either it money, or something else). Not all investment in gambling sites ended with good result, there is a thread which still discussing about investment in gambling sites, and you can see on there, there are some good gambling sites and some bad gambling sites.
Large investment = large risks, but it is worth if you make some nice profit