“I’m in” as button text tackles the opt-in action directly. Visitors that have read your content and have agreed to continue developing their relationship with you are ‘in’. If you’re making any sort of presentation or offer, “I’m in!” allows your visitors to opt-in with passion and zeal. Like agreeing to an outing with a friend, “I’m in” states that you’re subscribing to what is offered.
Most SaaS companies only mention their product very subtly (if at all) in their content, but using this method, you will mention your free trial natively in your body content within your site’s blog posts. The idea is to subtly point out the fact that you have a free trial, your product does X, and it ties in with your blog post because X reason. This should naturally flow in your post content.
Email marketing messages can also help you increase traffic to your website. You can link to relevant website content within your email message or craft a compelling CTA that asks readers to head back to your website to take a specific action. If you really want to make your CTA stand out, you may want to use a colorful button, which makes it easy as possible for readers to take notice of your CTA and make their way back to your website.
Once you've tested the entire roster of emails listed above, you'll see that subscribers respond to some emails more than others. Don't be surprised if they're not just looking out for discounts. After all, email marketing is really about building a long term relationship with your subscribers. That kind of relationship-building requires more planning and variety. In return, you'll get better brand recall and customer loyalty.