r/RomanPaganism

For complex reasons I've been considering Religio Romana, and I have some questions.

1. Are there any major ways that Do ut Des differs from the Gifting Cycle?
2. What's the relationship between modern Religio Romana and Hellenism like?
3. Should I come up with something specific to ask for for formal purposes, or could I rely on gift-begets-gift here too?
4. What are some Roman examples of aniconic representation of the divine?
5. Wat was/were the Roman stance(s) on consuming offerings?