What counts as one product?
One thing you advertise, not one catalog line. Starter allows 1 product, Pro 5, Ultra unlimited.
One thing you run ads for, not one line in your catalog.
A shop with 1,000 SKUs usually has only a handful of products in Sellify. Twelve sizes of the same sauna is one product. A sauna and a cold plunge are two.
The test: would you write a different ad for it? If two items share the same buyers and the same reasons to buy, keep them as one product and let the angles cover the variants.
Splitting them means generating and maintaining a separate set of angles for each, and it uses up your plan's product allowance faster. Starter allows 1 product, Pro allows 5 and Ultra has no limit. When you reach the limit, adding another opens Product limit reached with a View plans button. Buying credits alone does not raise the limit.
Related
Add your first product · Understand plans, credits and workshop access · Understand credits