Preserving value if migrate from WhyPark to regular hosting
 

This may be a stupid, newbie-level question: Let's say I park a domain name on WhyPark and build a minisite (in essence) including affiliate links, attract some inbound links, build some PageRank, etc. If I then move the domain to a regular hosted site at, say, HostGator, and copy/replicate all...

This would depend on the hosting provider that you have services with. You need to get in touch with their support and check it. https://imagicon.info/cat/6-4/1.gif