Spiritual Satanism does not directly ban marriage or interactions based on your spiritual beliefs.
That being said, it is a good idea to not marry someone whose life goals, life ethics and perspective do not align with yours, as that can obviously cause disagreements.
Wiccans are a mixed bag, especially modern ones, which only really follow the pop culture information that Wicca offers, and are not necessarily sworn to it as a "path". Those can be of varying quality, but since they have the propensity to look into alternate sources from the mainstream, they might understand the wisdom of JoS.
Wicca itself is a constructed system that, while based in some folk traditions and some good practices, is heavily corrupted, watered down and weak. Partly due to external sabotage (Wicca is ostensibly a continuation of Thelema, which, as many know here, was propagated by a nutcase that worked with dangerous, jewish-adjacent entities) as well as just general ignorance due to not having deeper knowledge.
As a spiritual Satanist, you can marry someone who doesn't really have an interest in spirituality if your views align and you are otherwise compatible. If you were to marry someone spiritual, things are complicated, because JoS's message and information is ultimately the truth. The logical conclusion there is that your partner will see this truth and become a Spiritual Satanist themselves. If that does not happen, it is due to their personal limitations, spiritual curses upon them, and other factors. This is a hurdle that will often result in trouble.