I leased salsamoves' rig salsa2 for 6 hours yesterday. There were some hiccups that were quickly fixed and lease time was extended to compensate. I was able to rehire for another 6 hours at 10% discount. Great deal! At the end, I had leased the system for over 15 hours, but only paid for 6 + (6 * 0.9).
Before my 12 hour lease ended, salsamoves offered to let me rehire at a 20% discount. But unfortunately, my coins were tied up at the exchange and was unable to rehire before the lease ran out. (I use CoinedUp and I guess I got greedy, as nobody bought my coins at the rate I wanted I had to cancel my sell and try again at a lower rate, but I'm still waiting for them to sell.
Will rehire again, especially with the 10% & 20% discounts!
[ Edit: I got my coins converted to BTC and was able to rehire salsamoves' rig for 6 hours, and immediately got a 20% discount for rehiring for another 6. Huzzah! Thanks, salsamoves. Maybe I'll transfer some paper bills into BTC and rehire for 72 hours if I can get that 20% discount again :-) ]