Megaways, Infinity Reels and Hold & Win mechanics

Disclaimer. Online casinos for gamblers in Australia are prohibited by the federal Interactive Gambling Act 2001. ACMA actively blocks illegal sites and warns of fines for advertising them. The text is analytical.

1) Megaways

The point: variable number of symbols on the reels at each back. The number of winning combinations can reach hundreds of thousands.
Technical implementation: RNG determines the number of characters on each reel; the total number of "ways" is generated dynamically.
Effect on player:

each spin is unique in structure;
a high sense of unpredictability and "scale" of winnings;
high volatility, potentially large drifts.
Market impact: mechanics are licensed by many providers and have become the industry standard.

2) Infinity Reels

The Point: For each winning combination, a new reel is added to the right, theoretically unlimited.
Technology: dynamic generation of a reel slot on the server, the client draws an "infinite" extension.
To the player:

the illusion of an endless increase in winnings is created;
increased engagement due to the mechanics of "another chance."
Feature: Winnings are often scaled through multipliers, which enhances variance.
Market: Niche but vibrant mechanics focused on high rollers and streaming content.

3) Hold & Win

The Point: Fixed jackpots and respins. When special characters are dropped, a bonus round with "sticky" characters is launched.
Technique:

fixed prizes (Mini, Minor, Major, Grand);
the bonus lasts while new characters drop out;
in the final, the win is summed up or the jackpot is activated.

To the player:

simple and straightforward mechanics;
high emotional involvement when filling the screen.
Market: a mass format well received by newcomers and mobile audiences.

4) Common factors in the popularity of these mechanics

2. Streaming appeal:

5) Australian context

6) Risks and limitations

7) Global Market

8) Conclusions