So instead of just replying to him personally (which I did as well) I've decided to write the answer up as a post so anyone reading can benefit.
John asked It's one of those questions that is kind of tricky to answer as almost any niche that has a lot of buyers and affiliate products to sell can be insanely profitable if done correctly.
As a Silicon Valley firm, we have been in the online dating business for over 17 years!
Our affiliate programs pay one of the highest commissions available in the industry.
Many others will have many more niches available like religion, ethnicity and even vocations.
We know, when it comes to Online Dating it can be hard to see the wood for the trees thanks to the huge amount of dating sites out there, but don’t let that intimidate you, it’s really not complicated and can even be fairly easy and fun.
Are you beginning to see how lucrative some of these can be? And the romance niches are also a good choice which we're about to uncover below...
Marriage Counselling costs up yo 0 an hour on average according to Self Growth, which shows just how lucrative it is.
Just take some of these other niches for example... When something makes someone feel happy or gives them pleasure they will spend money on it over and over again.
Hobbies, sports, travel and other activities fit into this category perfectly.
Meaning there's a lot of money around for the taking, if you're willing to help these people get fit and healthy. Wealth covers internet marketing, Forex, gambling, lottery, jobs and employment, affiliate marketing, multi level marketing, business opportunities and more.
See these niche 'hacks' on the paleo diet and this "ugly" niche to get some ideas. The online business industry in the UK alone is worth £100bn according to The Guardian, that's twice as large as the hotel and restaurant industry.