The health of a relationship largely depends on the maturity of the partners involved.
If you’re with someone who acts like a child, then the relationship’s health will suffer.
This is fair enough as these dating websites are costly to run.
What they usually offer you for free is the ability to browse members profiles but not to be able to contact members until you purchase a subscription.
Once you find one that suits you then it is best to take out a paid membership as that will give you access to all the facilities available at the site.