Hi Bonus is good enough to attract early investors and give them some kind of advantage over those that will invest later one,but not too big,in order to cause possible dumps,or discourage those who want to invest at later stages.
They haven't yet decided the percentage of bonuses for investors during the crowdsale period. They will calculate accordingly and investors are more assured when Desico tokens allocated to the team will have a lock up period of 12 months.