That is because nobody was blatantly hacking scores back then. Boosting scores by hacking the game's files is something that they probably just encountered for the first time.
no, that's not hacking the score file, because if I hack their score again I'm sure my account will be forfeited in a few hours.
if you've seen my account that reached a score of 98m
that I hacked the score file directly from system.lua
and finally lasted a few hours and ended with the loss of the account (banned)
and what you see now that score on the server will only look like a regular skill score (repeat)
because basically their own skill card makes the score explode, and here I just changed the script a little, by disabling the skill card limit I mean (SR scorer)