As a nonprofit, all of our ticketed events require an option for people to either make a donation in addition to registering OR make a donation instead of registering. We can collect an additional $25-$100 from each registration by including this feature, which amounts to thousands of dollars raised during the registration process alone. We've found that by having separate donation and registration forms, we miss out on these last minute gifts before checkout. 

The option to either make a donation in addition to registering/make a donation instead of registering was available in Sphere but not in eTapestry's standard DIY forms. 

By modifying the DIY Event Registration Page form to include the ability to do the above would help nonprofits raise more funds for their cause and streamline the giving process.