Ask HN: What type of compensation for 'Technology Adviser' type role?

-=My Background=-

- Software developer manager with 14 years experience in multiple software companies/roles.

-=Situation background=-

- For the past 6 - 8 months I've been in contact with a person who owns a company, giving some tech advice, thoughts, advice.

- Company has been around for a year or 2.

- They already have tech in place but is outsourced and the founder is non-technical; so honestly they are not sure if they have good software/are paying the right price etc.

- We've probably had contact 4-5 times.

- No payment or contract; although there has been vague talk of that in the future.

- I am perfectly happy with the chats we've had and it being casual/relationship building at the moment.

- I quite enjoy the market the company is in and like the idea of some kind of more formal advisory role going forwards.

-=Question=-

- What's the normal way in which compensation for this kind of role is handled? (It would be outside of my normal fulltime job). Some kind of retainer? A slice of equity? A nominal salary? Starbucks gift card....

- I'm not pressing hard for a position/role but would like to have my ducks in a row incase the conversation presents itself.

Thanks