OK, so I had some time to analyze the hand history provided by OP.
During the hands when gd1990, caroline93, and MichaelDE are playing by themselves, there ZERO showdowns. So not 1 single showdown in the first 43 hands. That's a bit odd.
The first showdown happens in hand 65, or #242704944, after valentinos77 and AshPK have joined in. gd1990 wins the pot.
The second showdown happens in hand 70, or #242712360. MichaelDE wins the pot.
The third happens in hand 79, or #242712484. gd1990 wins the pot (the one in this
screenshot).
So you can see that showdowns only started happening after other players had joined the table. The longest streak of no-showdown, across all 867 hands, is by far the first 65 hands; 43 of which were only played with the 3 players suspected of collusion.
While other players were playing:
Showdowns between gd1990 and caroline93: 5
Showdowns between gd1990 and Michael DE: 11
Showdowns between MichaelDE and caroline93: 1
Across 700+ hands played together, there was only 1 showdown between these two players... That's pretty anomalous, don't you think?
Thank you very much for taking the time to go through these hands and give your opinion.
OP did collusion with obvious tactics, and now makes all of these threads and accusations after getting caught.
It is actions of a person without morals and without ability to accept their actions.
SwC will continue our 10 year history of spreading fair and fun bitcoin poker, this cheater will not stop our mission.