You can do that and I will donate 1 LTC again, but for others you will need to write out your ideas, other peoples feature requests and have a road map for going forward so people know what they get if they contribute/donate. Make images and screenshots (dont do the coding work) and show it off and say this is coming etc...Also not everyone has money and times are tough with the market being soo bad atm, you will need to think of a minimum donation, it might not be what your product is worth...but not many people have 1 or 2 LTC to give away.

Even if it means you need to make your repo private and going forward no one can install without a donation...anything but don't stop developing, even if it's in your free time (if you have).