form be brought up into an mobile friendly overlay - when the user clicks a button?

2)For example on Tier 1 can I set up up 5 'sub accounts' for different clients for different 'sub users' and give them access to their sub account only?

3)Do you intergrate (or plan to) intergrate with any payment gateways?

4)Do you have any plans to intergrate with:
a)Konnectzit?
b)Pabbly Connect?
c)SendinBlue?
d)Encharge?

Many thanks,

Matt