Dish clearly makes the determination on a case-by-case basis - my 2nd leased 622 was delivered and installed today after I sent an e-mail to
ceo@echostar.com (after seeing this and related threads); I requested an exception to their max-4-tuner policy and received a call within 2 hours of the e-mail approving my request and informing me I was eligible for the $50 savings on the $149 upgrade fee. As a result, I am now running 2 622s and a 942, all leased.
FYI the 2nd 622 replaced an owned 211, which I'll put into storage for the time being.
Cheers,
Todd