If there are seriously that few that join a bounty and 95% of the rest are multis, then what the hell are companies wasting money running a bounty on here then? Kind of proving my point as well, managers are being dishonest to companies by saying they will get you loads of participants if they know its all alts.
Not every newbies are alt of course. As you said, managers are intentionally/unintentionally being dishonest though I can guarantee not every manager is. Anyway, if someone participates from 30 account in a single bounty and there are 10 different such farm participating in a bounty, it will be almost half of the total participants.
but I highly doubt $50 a month is anything for an Englishman.
Of course he is not an Englishman, nor someone who will honestly work for you. I can't trust anyone to work 100% when they charge this lower amount.