List of share stocks which give you discount on their product as shareholder offer

the one i know 

1.IHCL (indian hotel company limited) part of TATA group , regularly send coupon and offer through email for Taj hotels mainly

2.Hawkins cooker 25% disconunt for shareolder https://www.hawkinscookers.com/3.11.shareholder... 

also apparently there is some SEBI rule that u can have to make uniform benefit for all sahreholder , that mean even buying one share of them will suffice 

is threre other also like this?