This is the question that the medical community cannot definitively answer. There are some on here who think that the strength of one's immune system prevents or allows more warts. This theory has not been accepted by doctors but many on here believe it.
Do you smoke cigs? Drink a lot of alcohol? Eat fast food? Get little sleep? Under a lot of stress? Not exercise or take vitamins? There is definitely a link between cigarette smoking and getting more warts. And if you can lead a more healthy life, then it is possible that the warts will stop. Also, the use of latex condoms during the recovery period has been shown to help your body prevent more warts. For some people, this recovery period is longer (2 years) and for some it is shorter (2-6 months). No one knows where they fit in but if you have been having un-safe sex than it is possible that your body can't fight it due to the sex and you need more time to recover than others.
Yes those are good possibilities. I don't smoke, but I drink pretty regularly (not a lot, typically no more than one beer at a time, but still pretty frequently) and I don't get much exercise these days. Maybe those changes would help.
When I got mine, I spend six months not drinking anything. Exercise, vitamins and supplements are what boosted my immune system and I drink only a little now. Not every day. Ales are the worst for warts, btw.