Requiring registration is not the same as requiring an invitation, but nice try. I don't know of other robot companies that have held public conferences, but none are required to by law. They are required by law to hold SH conferences. So why would GOSY hold a conference it is not legally required to and refuse to hold one it is? And is there an answer to my last question? This is the third GOSY conference. What tangible benefits did the company obtain from the first two?
iRobot's share holders meetings always contain demos and a show and tell and are open to all share holders with out a inventation. But GOSY show and tells don't have a share holders meeting and require a inventation.
The Apple conference being held this summer is sold out, and cost participants $1600. Every conference I've ever attended and was invited to, I had to register up front months in advance and pay.