yes we actively develop it, you can track the dev progress here https://github.com/microweber/microweber
new version is coming soon with a lot of fixes and improvements
microweber still beeing developed any further?
There are bunch of payment gateways which you use and try to make sure their secure one. The https://www.australian-writings.net/ provide some of the lists which you provide and try to use secure methods of it. You also need to test it first.