You're right in that all hosting services suffer this problem to some degree, but it's a particular problem on EC2 since it's so easy to request IP for an instance that does something bad, then release back into the pool for other instances to use, a short time later.
It only costs a few dollars to that on EC2, whereas most other hosting services require at least a month's commitment and higher fee(s) before you can defile one of their IP addresses.
BTW, the reason I posted was to find out what other blacklists might be out there, so if your company is blocking access, I'd appreciate letting me know which service they're using.
You're right in that all hosting services suffer this problem to some degree, but it's a particular problem on EC2 since it's so easy to request IP for an instance that does something bad, then release back into the pool for other instances to use, a short time later.
It only costs a few dollars to that on EC2, whereas most other hosting services require at least a month's commitment and higher fee(s) before you can defile one of their IP addresses.
BTW, the reason I posted was to find out what other blacklists might be out there, so if your company is blocking access, I'd appreciate letting me know which service they're using.