The simple answer: More money for Leidy on an official website.
To go into a little more detail, crowd funding websites are third parties. This means your content may be fine, but if it ever crosses their invisible line, then they have free reign to terminate your account for whatever reason. Current crowd funding systems are also difficult to navigate, with sub-standard ways of delivering content (amount of photos in a set, videos, etc). There are too many limits for what we desire.
The other big reason is security. LeidyMarvel will use our high security methods to reduce piracy, fraud, and other ways people try to steal content. Most websites are very lackluster in how they protect their models. With an official website, we can protect Leidy and other models with our proprietary security that reduces a large amount of pirated content. There is no other modeling website that does a better job at this than us.