My view is that people should be reaching out the lesbians in question who are encountering these issues, as opposed to publicising the cotton ceiling as a concept.
The term in itself encourages rape culture and I think that by giving this term and the idea behind it any oxygen, it will actually make things worse for lesbians as opposed to better.
Personally, as a lesbian, I'm not comfortable with people who don't stand to be disadvantaged by this term (i.e. non-lesbians) promoting its use as it is designed to threaten and to make lesbians feel vulnerable and it is the term itself that implies sexual violence, regardless of the person using it.
It's very clever of whoever revived this term online and started bringing it to the attention of feminists as it has the effect of using women against each other to make lesbians feel more threatened.
I'm glad other women have my back, but I really wish people weren't using the term - please reach out to the lesbians you know who are being affected by the harassment if you want to show support.