How is it significant in any way?
as soon as you put the investment in the site you accept to see it lost in case of a lucky run.
Unleveraged investors presumably want to be risking 0.5% of their investment to a max-profit bet. But the 2.5% limit means that doesn't happen. How is that not significant? It means investors are risking less than they expect to, and suffering reduced expected bankroll growth as a result.
Your comment about accepting loss is irrelevant here. It is unrelated to what I was saying.
"Site profit" doesn't matter. Individual player profits matter, and individual investor profits matter, but the sum of them really doesn't mean anything, not even to the site's collection of commission.
Yes, but the 1x investor is expecting to be risking up to 0.5% of their investment per roll, but only getting something like half of that due to the 2.5% limit.
I don't see why you wouldn't simply remove the 2.5% limit. It's not helping anyone: it reduces the maximum bet size for players, makes investors risk less than they signed up for, and reduces the site's expected commissions.
Having said that, it's your site of course, and you're free to run it how you like. I just don't understand.