Don't bother. I've learnt to use a proxy US IP website, which works generally for a large number of surveys that have come my way. But this isn't fool proof - sometimes doesn't work when the connection from e-Rewards to the actual site that hosts the survey is imperfect.

Once I've collected enough and redeemed for what I intend to can redeem, I'm closing my e-Rewards account for good.

The rationale of restricting e-Rewards to only US IP addresses, when some members actually joined at the invitation of UK based airlines (eg. BA, BD, VS) clearly knowing they reside in the UK, is baffling. Plus if you ask Customer Service the question, they'll never admit to this stupidity - months on, still claim they're "working on the issue".