I'd be cautious about using Volta stations. They're frequently (but not always) mentioned in
the thread on melted J1772 adapters. My own hypothesis is that, because Volta EVSEs generally provide higher amperages (40A or 48A, IIRC) than most others (30A or 32A, typically), a small amount of dirt in the Volta or Tesla J1772 adapter can lead to excessive heat, and therefore to damage. Your first photo didn't look like your adapter was heat-damaged, but it's conceivable this was nonetheless the problem, but the damage was not visible in the photo.
When I got my first EV (a Chevy Volt PHEV), I'd take every opportunity to charge at public EVSEs. With the Volt's 53-mile battery range, this was sometimes the only way to get home without engaging the gas engine. With my Model 3's 325-mile rated range, though, a Level 2 EVSE doesn't give enough added range to make much difference, except for hotel stops on road trips. If I can afford a $50k Model 3, I can afford the $1 or so of electricity I get from plugging in for an hour at a mall. That savings is certainly not worth the hassle and potential expense of replacing a damaged adapter. At this point, I'm more likely to plug in just to add a PlugShare check-in, if a station hasn't been used in a while or has been dinged in the ratings because of a problem that's now resolved.