I'm sharing this post with the hope of finding someone who might have helpful information!
During a conversation with others, I learned years ago that if you change your bet once you've reached the maximum stage in Wild Swarm, it might alter the probability of triggering a swarm.
After thinking it over and talking to some knowledgeable people, we now believe it's very unlikely, but the initial info came from a reliable source, so I'm curious to see if anyone else in the community knows more.
Something to note:
From what I gather, Wild Swarm 2 has different RTP levels depending on the hive stage you've reached, which suggests that the risk of initiating a swarm wouldn't depend on the bet amount. I'm uncertain if this applies to the original Wild Swarm.