Just phoned up Bell Customer Service, again things are not the same there.
Installation fee: Bell said that installation is free for only the first receiver, purchase or rental. Subsequent receiver is $50. each for installation fee, regardless purchase or rental. I even asked saying that the Bell store said that if all rental, all 4 receivers (up to) are included installed (i.e. no fees), and he said that they are wrong. After reading what Pinza posted, I am not sure whom to believe, totally confused! (why can't they put those things up on their website? Nothing there).
# of receivers: Bell said an account can have up to 6 receivers, regardless of HD PVR or others. But he said that one can only "order" 2 HD PVR, or other receivers (or a combo of 1 HD PVR and 2 others) at one time. It seems to mean that is same for purchase or rental as well? Got a bit confused there, but he suggests that the customer should activate one at a time, and then call in for the rest (again, I earlier said the others might be rental but I haven't made up my mind yet, that was communicated clearly). So there seems to be a procedural hurdle, but can be 6 receivers in total after all.
Discounts: Bell said that the $10. per month credit for 12 months on applies if they are all rentals. If one unit is purchase then no credits. This is not clear on their website.
Equipment credit / discount: Only first purchase unit has the $100. programming credit (at the store I thought that was a purchase discount) on the HD PVR model, and then 50% of original price bill credit. Subsequent purchases must be full retail price, and no credit or discounts, regardless where it is purchased (Futureshop, or Bell store).
Contract: Purchase is 2 year contract. Subsequent rental w/ first being purchase is 1 year contract on the rentals themselves. All rentals are 2 year contract. Early Cancellation Fee is $149. + $50. for each rental. If downgrade rental, then also ECF on the unit.
Lots of info I have been trying to sort through but various inconsistencies found from diff. sources. Oh my!