Naturally visitors are always welcome. We had a gentleman in our parish who attended on a more or less regular basis for 10 years before being received into the Orthodox Church. We fondly referred to him as "the Oldest Living Catechumen."
The OP states up front that she has no intention (or presumably desire) to convert. I give her the respect of taking her at her word.
Not that this is what she is doing, but I personally would not attend a synagogue or a Buddhist or Hindu temple etc. (unless invited, or for a specific purpose, such as a funeral or wedding) out of mere curiosity, or to "see how they do it." Or to "incorporate aspects into my own spirituality." (as I often hear). That seems to me to be disrespectful.
While I understand what you are saying, and agree with you to a certain degree, the OP did post in the Converts Forum, not Other Topics, or Free For All, etc.
As a rule, I tend to be encouraging of individuals who might, even on the slightest of chances, actually convert.
Therefore, I find that it is better to err on the side of having them convert, rather than err on the side of dissuading them from possibly converting.
Joanna didn't say she was only attending services for merely a novelty experience. In fact, she stated that she has conversed with the priest, is learning more and more, is on this Forum to learn even more, and asked for advice on reading materials on Orthodoxy.
All this points to a valid interest. Perhaps a spark that needs to be fanned and encouraged, and not extinguished.