You can develop motivelotto.com into an online gambling site or offer online sale of lottery tickets of major online/offline lottery companies other then that cant really think of any thing else.
I would go to develop that lotto site,its a topic that will have loyal followers.
I can make up articles for you regarding Tips and rules to guide you in choosing the right winning combination.
Perhaps Bingo goes for my second choice.
Also you can develop motivesurf on creating some blog where you can write about motivating people of all kind,If you market the site well you are bound to get some good amount of visitors
I can see why you are having a hard time thinking up a plan for these sites. I had to think a few minutes, myself - lol
But I think the suggestion for motive surf or motive site and motivating people is a good one. People are into this trying to improve themselves fad and that would work well.
Motive bid might be alright for some kind of auction or ppc.
make the find a job site. And make the rest in touch with what they say. Lottery would be easy. Maybe get a script and start up an organization. A lot of money would be in that. Make sure the domain suits the content.
I think MotiveSurf makes a Great GTD site.
Quality GTD blogs and Link Aggregators are lesser on the known web.
That a niche suggestion for you!
Half profit to me
MotiveBid would be cool as like a eBay site or soemthing similar.
MotiveLotto would suit a gambling type site.
MotiveFind would be quite cool as a map system!