Usually, buying plain point packs contribute towards the next level of the core supporter pack series (the one with the 4 tiers), meaning if you purchased some of those plain point packs you only have to play the difference if you want to upgrade to a "real" supporter pack. Remember though, you will only get the difference in shop points to spend from that pack upgrade.
In your case that means, you have already spent 100$ on point packs, so you should be able to upgrade to the Faridun tier for free. You get all the cosmetics from that pack and the packs below for free, but you will not get the 1000 shop points, since you already go those from the 5 individual purchases.
My Shop page looks like this:
I have spent 2x 10$ on point packs, so I get a 20$ discount on the Faridun Tier, but the pack will only grant 800 shop-points instead of 1000 if bought directly.
To see these increments and upgrades, you need to be logged in on the homepage with your account.
If you want the "real" pack in the first place, you can simply go for that one of course, there's no need to buy up incrementally with plain point packs.
However, I have no Idea if that's also true for Console-Accounts.