Is The National Society of High School Scholars a trustworthy company? Is it worth it to join?

I was accepted and i did not know if this is a good society to join
Is The National Society of High School Scholars a trustworthy company? Is it worth it to join?
I was accepted and me and my friend were talking about it last night..She said she read up on it and they are only in it for the money. For example, they promised like 4000 students good seats at president obama's inauguration, but they ended up getting the worst seats, to top it all off, they had to dress in formal wear while the dress code there was casual. This trip was $2000 for the students, and the NSHSS did not pull through on their promises. On top of that, the tuition is crazy.