You also have the issue that the places with the biggest transportation issues on election day. Both in terms of individual urban neighborhoods that are under served by infrastructure, which cabs and ride shares tend to avoid. And more spread out cities, suburbs and rural areas where there just aren’t any cars at all.
If they really wanted this to work it’d be free carpool rides there and back. And they’d pay the drivers a bonus for working specific areas near them with an issue. Much more like traditional busing and car pooling to the polls is done.
As this stands it seems like another marketing ploy that will mostly benefit their already well off, white customers who don’t really need any help getting to the polls. Designed to further position lyft as the non evil competitor to Uber.
Might help getting students to the polls. Tend to be lots of uber and especially lyft in college downs. But that’s the only voter suppression target group I can see this really working for.