The phrase "a main incentive" is correct and usable in written English.
You can use it to refer to a principal motive or cause that encourages someone to act in a particular way. For example, "Organizing a company picnic was a main incentive for the team to meet their quarterly goals."
Other Republicans pointed to the help for road and bridge building as a main incentive for voting for the measure.
Voters are not required to register with a party to participate in these elections, removing a main incentive for registering with either the Democrat or Republican parties.
A main incentive was that the Norwegian Public Roads Administration wanted the station building removed to make room for a new interchange towards Jar.
It therefore seems that the money was not a main incentive for participating.
Increased breast size should be an added bonus, not a main incentive.
"As a doctor who studied for several years, my main incentive would be a good salary, along with adequate working conditions to perform my clinical duties.
In Washington state, which also has a cluster of data centres (Microsoft, among others, is at Quincy), legislators have been willing to make deals with inward investors, but in Oregon there is no need for special arrangements.The other main incentive is a concession on property taxes.
From a healthcare professional perspective the main incentive to implement ICTs was the practical use in daily care; different patient groups were identified where the use of ICTs potentially could increase the elderly persons' ability to live more independently in their own home for a longer period of time.
The main incentive for an individual is that they are, in effect, getting advice tax-free, so for a basic rate taxpayer it's effectively cost them £400, while for those on a higher rate, the cost is just £300.
Having a direct connection to water did not improve water quality in comparison to Tangier's public faucets — meaning that the main incentive for having a connection was convenience, not health.
The main incentive for business is a proposal that would greatly increase the ability of small proprietorships to write off investments in new equipment as an expense at one time.
