I've been reading up on Solo Ads and it seems that most of them are only contain the email addresses of those who are interested in "Making Money Online". What if you wanted to purchase Solo Ads that catered to:
1) Pet Lovers
2) Travel Enthusiasts
3) Recipe Collectors
4) People Wanting to Lose Weight
Are there any people selling Solo Ads to these or other types of clientele not in the "Make Money Online" niche?