I was thinking of investing to yolodice's bankroll if I understand it correctly for example you invested 1 Litecoin and your total share is 10% of the 10LTC total pool and if the total pool became 50LTC your share of it is still 10% so it will become 5 LTC am I right?
You are wrong I believe because if the total bankroll is 10LTC and you invest 1LTC that means your share is 10% in the total bankroll but if other invest and the bankroll becomes 50LTC and you don't invest again then surely your investment remains 1LTC which is 2% actually. That said, if the the bankroll was 10LTC and it grows to 50 from that itself gaining profits from gamblers and no new invest then your share should remain 10% as simple as that.
By the way as I was checking yolodice I saw that they have lowered the commission so you might want to check that as it reads "We are lowering commission on all LTC investments to 35% till 31st December 2020. This applies to all new and existing investments!"