Large companies frequently use opt-in advertising as a key tool in their overall marketing efforts. What could be better than presenting a seamless way for an interested user to subscribe to your brand’s newsletter without interrupting their internet experience? But large companies are not the only businesses that can use opt-in advertising to maximum effect. In fact, opt-in advertising can be both productive and cost-effective for small businesses as well. Here are the top reasons opt-in advertising is a great fit for small businesses.