From my understanding, Singbet does not offer API for their odds so Molly (PT, SM) has to scrape their website. Having just one account for hundreds/thousands of clients is simply not possible so I don't know where you got that information from (1-3 accounts on SM). If I check my Betting History now, I can see at least 15 different account names (hashed) so I would say that you have stated that without any special proof to back that up.
As for Singbet, I would rather have them and accept the risk of voiding bets than not have them at all - as others have pointed out.
agentxxx, you have to live with the Voids if you want to have better odds/more markets displayed; this void is completely "normal" for Singbet, as much as it sounds stupid.