The refund would be a fraction of a dollar that people would have paid for the incomplete part of their final month, no? So perhaps it's hardly worth refunding, or perhaps they did.
A cheap low reliability non-spammy service is a pretty good niche for hobbyists. Who cares that it shut down. It did a job while it lasted.
Yeah, they charged in increments of 12 dollars iirc. It wasn't set up as a yearly sub though - it just worked as account credits, so if you had multiple sites it would deduct money from the same account pool.
A cheap low reliability non-spammy service is a pretty good niche for hobbyists. Who cares that it shut down. It did a job while it lasted.