What industry is your project/idea in? Please enter each on its own line.
There are many industries that are more difficult to crack than others. Segments like dating, social networks, etc. are much harder than others because such platforms depend on having a lot of content to attract users, and to eventually achieving critical mass - you don't have users until you have content, and you don't have content before you have users. So it's kind of like a chicken or egg situation.
Therefore, these platforms require considerable amount of marketing budget to grow because it's difficult to get early traction with these services. Therefore, if you plan to build such platforms, it's crucial to have a solid go-to-market strategy.