Font collections like these are all the same, X,000 fonts, mostly filler, crap you will never use. No, they are not misleading; a typeface is a style of lettering (Times), a font is a particular variation of that style (Times Bold Italic). So yes, this collection really does contain 4,000 fonts. And they are tempting because you want to think, "WOW! 4,000 FONTS! Just think of all the cool stuff I can do!"
Don't give in, or waste your money. Typography is like furniture, price reflects quality, durability, and value. 50 classic typefaces will last you a lifetime, and serve you far better than * 500,000 FONTS * ever will. Classic letterforms have been around for centuries, even millenia, for good reason. If you consider yourself a designer, invest in the Adobe Font Folio. It's all you will ever need. For everyone else, and for special purposes, use online directories such as fontscape to find what you need. There are many independent type designers doing great work--support them! Don't clutter up your computer with these bloated collections of castoff slag. Great type is great art; don't expect it to come cheap!