Remy zero for real?
Do they even have a gold record?
We're talking several x platinum for self titled.
That is not even close to the same league.
I'd say similar to maybe everclear, gin blossom, sugar ray, filter, toadies, fuel. Not one of these bands has a single 4x plat. record. They all have 1- 2 huge hits, then a few smaller hits, and it was all on 1-2 records. These are all 5-10m sellers give or take.
The next league up is several multi plat. Records with a few hits each. stp, 311, incubus, aic, soundgarden, goo goo dolls, mb20 etc etc. these are 20/30/40m selling bands.
Then the next league up is PJ, nirvana, metallica etc. ~100m +
Sticking to 90s rock for examples.