All the same it turns out too expensive. Although such are the prices in this segment.
I think in this segment $100 - not a money.
Depend of with what we compare.
Featured Listing for 2 weeks in ICOAlert cost $3000. And it will give you about 3-4k users for this time.
After adding to TOP70 free listings - you get the same volume of traffic.
And sure, if you add your ICO to top70 listings and buy ICOalert "Featured listing" - that will help you get much more users