The simple answer is no.
The reason is that creatine is actually just an immediate energy substrate. essentially all glucose is converted to CP, which is the final stage before ATP. CP cannot readily Be stored up. Only in small amounts and when it ia stored, a lot of water gets stored with it, hence the weight gain. The true benefits for this supplement lie in the preworkout stages. Not for maintenance brother.
no its not don't do that extend your cycle out to keep gains
Agreed, you can use it anytime you like really but I think you will notice its best effect when OFF cycle. PCT would be a perfect time.
Creatine is a combination of three different amino acids: glycine, arginine, and methionine. That's it! So it definitely always helps, although some people just dont like it. Some creatine supplements come with caffeine in them which is the part of it that I don't like, it makes me nervous. That being said I would cycle it kind of like what you do with steroids. It is not necessary to do so, but it can help. Your body has an internal equilibrium which you can swing in your favor for a period of time, but over time that equilibrium will eventually swing back.