aren't we just enriching these people? This is why I hate using Bitcoin to gamble today, it's a waste of valuable asset.
Did these people ask or pleased with you to enrich them? 
(just being sarcastic tho), but you might not have held the 1 Bitcoin till it gets to today's price or value. Honestly, if you had not spend your 1 Bitcoin in freebitco, would you be able to hold it till now? I am guessing that you would have sold it before now. Whether people are still gambling or betting with Bitcoin or not, it doesn't stop the casino from being richer, gamblers are still enriching the casinos irrespective of any currency they are using (be it Bitcoin, fiat, cryptocurrencies) . Agreed, he would't probably hold or sell for 2x profit and would gamble that too, or invest in a car or something that would be far less than the price a btc today, only a few people are real lonmg tearm holders