I think that there were some people in this forum who were promoting grin or maybe it was mimblewimble or beam....

Does not seem to be a good thing.

This article shows Trace Mayer getting called out in late February   including a link therein to a tweet showing the conference video footage, and then Trace Mayer has not been seen or heard from since then.

I wonder if Trace lost money on that project.. and many people would have wanted him to lose on that project (BIG TIME) based on his having had crossed over into a scam pumping set of behaviors at a bitcoin only conference.