This is a very lucky gambler and I haven’t seen anyone win such a huge amount by placing a $20 bet, are there more users like him who have won huge bets by placing such small amounts?.

Huge wins on this site.
I saw this and just had to have a screen of this to show it was possible. To get a line of the Ra symbols for the 10k multiplier.
The owner on his live stream said it was very hard to hit them all in a row like this.

But it is possible!
They do plan on releasing more slot variations in the near future. It was mentioned during one of these live streams which happen during their mega race every Saturday.