I dont know, maybe it's just my guesses, but yesterday I had 150 losses in a row, the game crashed before reaching my profit and would have reach at 151 time, but my balance had already ended at that time. Now Ive edited the strategy and in the morning (+5 GMT here) I have found out that some player is following me, though after some time he disappeared. I think that if two or more people earn according to one effective strategy, then most likely this will be monitored and the chance to earn decreases, although this is my guess.
With a >0% house edge there is no strategy that will guarantee that you will win, and it doesn't matter if there's another player trying to cash out just before the game busts as the bonus system has been removed if this is what you had in mind.
Plus, I have laughed a lot at the +5 GMT plus part, like the hour of the day really matters to a game like bustabit with users all around the world gambling around the clock. I am pretty sure there are slower times here and there but in the end this place is alive and kicking 24 hours a day, how could anyone think that their play time would matter.
Nobody follows anybody, there are of course people who wait until you leave before they get out as well but that makes no sense since the bonus is gone, so its makes no sense if anyone gets out before you or after you if you are playing. What could possibly be the reason, they might be stealing your strategy? That ain't a feasible reason, why would anyone want to steal your strategy when they haven o idea who you are.