Conference with very few submissions
Statistics could be artificially increased, but also the advertisements of the serious computer scientist could be faked (if they are on the website of the conference). Almost all of the scamming conferences use real, "famous" scientists that are supposedly chairing sessions and giving lectures, even though they themselves don't know anything about it. 

If you really think it's a scam you could withdraw, however I don't think they will actually remove your abstract from the website.

I personally think the best way to avoid scams or second tier conferences is to just talk to colleagues / mentors / professors in your field, as you might also end up at conferences that seem interesting but are actually not completely about your field.