My operating limitations say "No person may operate this aircraft for
carrying persons or property for compensation or hire." I suppose if
you get paid to tow another aircraft or tow banners you are "carrying"
property for hire. But if you tow it for free that should be OK. Also
if you take photographs on your own and then later sell those photos
you are not carrying anything for hire.

It also does not seem to exclude using your homebuilt as personal
transportation while on business trip and claim expense deduction on
your income tax since you are not carrying anybody's property or
persons for hire.