Because , upgrade is too simple like this (with the top 50) but what do you think of thats : have an other idea , one relic + 1500 electrum = 1% chance to have a nymph.
I'm not 100% sure I understood your response, but it seems like you're saying I'm discounting upgrades too much. If a relic can be sold for 101 electrum, a 10% chance at an upgrade puts an upgrade value at 1,010 electrum. Maybe a 33% discount
is too steep. Maybe a 7% chance of upgrade is better.
But one relic (101 electrum) plus 1,500 electrum = 1% chance to win a nymph? That puts average nymph value at 161,600. So, yeah... I won't be using that feature.