March 9, somebody from 877 467 3277 called. I answered on the second
> ring and they hung up. They did it again March 19 and March 29.
Large telemarketing operations sometimes use dialers that call numbers, and when there is an answer shunt the call to an available human telemarketer. If all the telemarketers are busy (on the phone, on break, whatever), you get a few seconds of dead air, then it hangs up.
This is an efficient use of the (probably minimum-wage) telemarketers, as they don't waste time dialing, waiting while it rings, getting answering machines, etc. The efficiency, of course, comes at the expense of the victims like you.