1: Yes i have endorsements with bass, string and Amp manufacturers
2: approx. 50% discount, and free promo material. and we're expected to promote these companies wherever poss. - live performance primarily, but also within my teaching business.
3: repairs that are poss in house are dealt with FOC, and a replacement instrument loaned in the meantime, anything that has to be outsourced is at cost.
4: not as such.
5: i get to use gear i believe in and love, and i can do it for less! we have gained exposure through our associations though.
as far as my bass deal goes, i have been using dean for many years, but only formalised the deal at the tail end of last year