For your offer to convert well, it has to be irresistible, but not necessarily using significant discounts.
A service specializing in creating irresistible offers. You get a consultation session and create with the service’s specialist an irresistible offer suited for your purpose.
Many have an underlying fear that they don’t necessarily know, and that might have more control over them than is good for them.
An online questionnaire that will reveal if there is such underlying fear that they should deal with to have a better life.
The cost for you is marginal or non-existent, and you get an excellent referral system.
When you sell a membership, give the new member a bonus membership (one, three or even more months) he can gift to anyone he thinks might find it useful. You can test it as a surprise after they already joined, or as another incentive to join.