From 2007 to 2009, the FIM introduced a rule that gave the reigning World Under-21 Champion a direct, automatic permanent spot in the following year's senior Speedway Grand Prix series.
Only two riders ever successfully took advantage of that specific golden ticket before the rule was scrapped:
Emil Sayfutdinov: He won the Under-21 World Championship in 2007 (and successfully defended it in 2008). Because of the 2007 win, he was handed an automatic full-time spot for the 2009 senior Speedway Grand Prix series. He exploded onto the senior scene that year, winning his very first GP round at Prague and finishing 3rd in the world overall as a rookie.
Darcy Ward: The brilliant Aussie won the Under-21 title in 2009, which technically qualified him for the 2010 Grand Prix. However, because he was still so young, he and his management chose to turn down the full-time spot to focus on his development, opting to take a couple of wild card appearances instead.
The FIM quickly realized that throwing a 20- or 21-year-old straight into the brutal, high-pressure world of full-time Grand Prix racing could sometimes do more harm than good to a young rider's career. It was a massive financial, physical and mental jump, and if a rider wasn't truly ready, a tough year in the GPs could completely shatter their confidence.
By 2010, they reverted back to the system we have today: making the juniors qualify through the senior GP Challenge or earn it via performance-based wild cards.
Parnitskyi has, of course, been given his spot due to DJ Woffy pulling out.