Obscuring giveaway links

What's wrong with you people discriminating against poor members like me who are thick as a brick? There are folks on site able to solve the most obscure riddles in a jiffy - I suspect them to work for or being associated with the Five Eyes.

But do as you must and don't forget to post the solution after the giveaway has ended. A week of brain melting should be sufficient to drive anybody crazy.

Jigidi.com is one way to obscure a link, but there are people who use autosolvers, so you may be inspired to expand your blacklist.

Another common way is to replace part of the link with unused characters, and then make a key, or riddle for people to fix the link

instead of backtracking the randomly generated GA urls.

Yeah, you're not gonna be able to get custom giveaway URLs unless you can convince someone on staff (e.g. CG) to create and reserve said links for you. It could technically happen, but I wouldn't count on it.

The only thing I could think of is, like GeoSol said, use Jigidi or It's Too Hard for prep, but you'd still have to edit back in whatever generated GA links you get, which seems to defeat the purpose of what you're trying to do (and Jigidi/ITH links are themselves randomly generated as well IIRC).

What about something like THIS?

cross word puzzle, nanogram and similar stuff
you can get creative with it

There used to be a site itstoohard.com which an old SG member created specifically as a tool for puzzles (you could make custom quizzes in it, which is basically exactly what you're asking for) but unfortunately fewer and fewer people have been using it lately and when it expired a few months ago the creator didn't renew it due to low activity.
It was basically the go-to place for puzzles... back when more people actually made puzzles. <.<

So... yeah, fingers crossed that that will come back. Until then, I guess you could check out zelghadis' guide to puzzles (already mentioned above, but since it wasn't a direct reply to you, I guess I'll mention it too ^_^' ). He lists a bunch of different ways people usually use to obscure links.