Interesting, but dont u get tired continually changing your bet?
And in regards to your question - I have occasionally wondered the same. ie is someone watching me and ***** down my returns, particularly when Ive significantly increased my balance with some good wins, but I really doubt it. For one it would be illegal, and if your playing at one of the more reputable casinos therefore very unlikely. With regards to your losing streak I can identify with you. Shortly after I started betting regularly a few mths ago I had a big win on Gold Factory slot winning $2000 then betting big I upped it to $4000 which I withdrew. Since then I had a few decent wins - $1200, $900, $1000 and a few smaller wins in the hundreds of dollars but the last 2 weeks I cant seem to win anything lol. Cocopop3011's advice is something I am going to take onboard. I'm just having a run of bad luck. I think the trick is though not to try and 'force' your wins by betting bigger. I'll keep depositing $20-$30 as I used to and betting small with a goal of having some fun. if I win great, but I wont be sucked in to chasing my losses. I think I'll get lucky again sooner or later. You have to lose to win.
As a side note, I know a guy who started a Bitcoin casino a couple of years ago & he let me test it for him before it went public. I noticed sometimes I won big then other times I couldnt win a thing. When I queired him about it he said "the slot machine will only pay from what it has accumulated". in other words, sometimes it just doesnt 'owe' anything and has no positive balance (bearing in mind the 96% return it paid) so it couldnt physically pay a big win. I'm assuming this is how most online casinos operate.