score:2
TL;DR: No.
There are three kinds of unlimited ride passes available in Sapporo:
There are all valid for one day only; if you need multiple days, you need to buy multiple passes.
The subway network in Sapporo is quite limited and most city center rides will be under 7 km, meaning 210-250 yen. This translates to needing at least 4 rides per day for pass #1 to pay off, and 3 for pass #2. In addition, if you need to use anything other than a subway, like streetcars, buses or JR trains, you need to purchase single ride tickets on top.
A much easier and likely cheaper option is to buy a SAPICA card for ¥2000. This gets you ¥1500 of credit and a ¥500 deposit, both of which are fully refundable. SAPICA can be used on all forms of transport not just in Sapporo, but pretty much anywhere in Japan; or if you already have (say) a Pasmo/Suica from Tokyo, that works too. In addition to the convenience of just tapping on and off anywhere, SAPICA automatically gives you transfer discounts where applicable and 10% "points" which are automatically redeemed for free travel when you have enough to use them.