If jackpots are so called "
spin and go's" or "Twisters" with a random prize pool and 3 participants, then it's the worst type of poker to play.
Sit'nGo is a better way to go for it. Personally I like and I'm quite good at hyper turbo HU games or large 90-180 players MTTs. But these types of games are designed as fast types of poker, 30-40-100-150 minutes and it's over.
The best value for $100 bankroll is following:
a) To prevent any possible tilt you must have a rule to spend not more than $2.2 or $3.3 per day, and this leaves you with 30-50 days of playing, reserve 4-6 hours at evening for that.
b) Using 2.2 or 3.3 per day leaves you with a few choices = play four or six 55 cent MTTs at
pokerstars or 2-3 MTTs with 1.1 buy-in or one for 2.2 plus one for 1.1 or just one for 3.3. It's best to choose bounty-type MTTs
c) Depending on your choice after 30 or 50 days of gambling(not consequietive preffered) you may find out how good you're at tournament poker. If you'll be playing only JJ+ and AQs+
hands you will discover that after 12 days of messing around you will finally reach the final table and will have a chance to boost your bankroll to the next level.
Personally I think that cash poker or MTTs are something like sport, while other types of holdem like spin'n'go jackpots or speed poker are close to casino type of games. Why do the bet/call/fold thing in that jackpot game if you can simply buy a lottery ticket with a same chance to win a million, except for you won't have to play cards vs 2 opponents if such prize hits. In these jacpots you have to test your luck and see the river with short stack, so you have to all-in often and call all-ins... In the mean time during MTTs you may force opponents to fold better hand on flop, or to not let them catch their winning cards on the river, and this is priceless value of the MTT.