I am very impressed that you, as - in the end - a profit ortiented business, decided against a premium system with a chance element.
While I love this site, this one element I considered hightly questionable. It was gambling, with all it's drawbacks for the users. I do not see a problem with having items behind a pay walll. But drawing gamers into a gambling scheme gets a hard pass from me.
It's also a good decision from an economic perspective because there are countries which are working on a ban for all "loot box systems" or make them carry an age limit.