So I made my second deposit of $20, didn't take up that 50% bonus offer, then continued playing on my favourite Finn game, from where I had last left it. There isn't any deposit fee to be incurred, so that's one good point I had forgotten to mention right from the start.
My first play on Finn game got me up to the 15 Keys level, a fairly good game play, if I may say, but my second session didn't turn out the way I had wanted it to, or expected it to. This time around, I could only get 3 more Free Spins games from my $20 deposit, which gave me a bit of extended playtime, but that was it. The 3 Free Spins games didn't give any good wins, only mediocre wins, so I finally ended the day at the 18 Keys level. A bad result in comparison, simply because the game was still in its dry run mode, and my $20 certainly wasn't enough to ride it out.
How much more would I need to deposit to ride out that dry run? Your guess is as good as mine, but that's not a deterrent to me. I will definitely be back soon enough, with one more deposit, giving it one more try. I do know that the game cannot go on like that for very long - it usually doesn't, except during a few very long dry run sessions, so I'm hoping that my next play would finally break the ice quickly - if it doesn't, it'll break me quickly instead! Hehehe.