You should still follow up with them via email, sending some information for them to be able to peruse at their leisure, and ask about connecting with them via phone. Then keep them in your contact list and reconnect with them.  People are at different stages on their quest for working at home.  While some are ready to jump in right away, someone may be "just curious" and "just looking" right now.  Never rush to judgment on your contacts or leads.  If someone is just starting out, they may be collecting info on 10 - 30 companies and don't want 10 - 30 different people calling them on the phone.  They may feel that they might be put on the spot or pressured by being on the phone with someone they don't know.  So, by building even a small relationship via email - that can put the person at ease to then eventually want to speak with you via phone. 

If you sell a product, there WILL be many people that impulse buy or know specifically what they want while shopping around, but there are also a large percentage of people who need to see your name and product over and over to let it sink in with them and let them gain trust in your name and business.  It is one thing to have friends and family and people from networking circles you are involved in becoming your customers, but the real key to your success is when you are able to turn virtual strangers into customers, and hopefully into repeat customers for years to come.  Again, don't discount the people who make initial contact with you, whether it be seeing your products in a store, at a trade show, or sending you an email with a question.  These are all potential customers who may just need to be kept in the loop and feel like they are learning more about you and your products before making a decision.  Not everyone will be in need of what your business has to offer at this moment in time.  They may be ready to make a purchasing decision 3 months from now, but as stated above with business opportunities, they may be simply searching, browsing and collecting information on their options prior to making a final decision.

Don't shoot your business in the foot by discounting people because they are not where YOU want them to be right now in their decision process.  You may even find that the people who take their time and research thoroughly before coming to a decision, will end up being the best customers or hardest workers on your team.