>>/1019/
Where is that from? Some private dm you can't post?

In any case, my original 3 possibilities still stand:
1) Bonbi never actually visited the 4chan thread herself and only heard about the "leak" through Seth, it's possible she didn't know what exactly we knew. Maybe Seth told her that somebody leaked that they were playing together and Bonbi just took his word without checking herself.
2) Bonbi figured that once we are suspicious, there is a high chance that we will keep an eye on them and eventually figure it out. People would notice how their levels seem to rise more or less in sync or might have spotted something once she streams.
3) She got tired of keeping it secret and wanted to stream with anonce anyway, so she needed a way to reveal it.

The statement you posted does not rule out any of these three possibilities.