Since you posted your ad here, I think it is fair to respond.
Every month or so a manufacturer will post cheaper spools that have less filament on them here. I am not sold by the idea.
You say your prices “start” at $9.99, but I see only one spool on there for that amount, white.
Your filament is actually 12.99 for most colors, which is more than I pay for my larger spools by volume. I pay $22.00 per kg. for large volume, top quality filament.
You do not have unique colors, so I would be paying more for the same filament I use and that I trust.
It seems what you have done here is lowered the volume and raised your price to not be competitive.
I also think there would be more waste in ordering smaller spools, as I do not like to have to watch my printer closely when I am getting short on filament, so I would not like to have so many nearly used spools, a result of having smaller volumes on each spool.
You need to sell me on your idea. I do buy five dollar filament small spools of neat colors, but do not see myself buying standard colors in small amounts.
Or you need to tell me why I should pay more for your filament, to get me off my current brand.
Or you need to offer new colors, for when I need that one off print of a weird color.
Or you need to offer bigger spools at a competitive price, perhaps partnering with 3dhubs so users can get a discount, since you are using their platform to market your product.