A CRI Certificate may be applied to any EASA aeroplane licence except the LAPL(A). The privileges of the CRI are found in FCL.905.CRI:
FCL.905.CRI CRI — Privileges and conditions
(a) The privileges of a CRI are to instruct for:
(1) the issue, revalidation or renewal of a class or type rating for single-pilot aeroplanes, except for single-pilot high performance complex aeroplanes, when the privileges sought by
the applicant are to fly in single-pilot operations;
(2) a towing or aerobatic rating for the aeroplane category, provided the CRI holds the relevant rating and has demonstrated the ability to instruct for that rating to an FI qualified in accordance with FCL.905.FI(i);
(3) extension of LAPL(A) privileges to another class or variant of aeroplane.
The matter of remuneration is covered by FCL.205.A as follows
FCL.205.A PPL(A) — Privileges
(a) The privileges of the holder of a PPL(A) are to act without remuneration as PIC or co-pilot on aeroplanes or TMGs engaged in non-commercial operations.
(b) Notwithstanding the paragraph above, the holder of a PPL(A) with instructor or examiner privileges may receive remuneration for:
(1) the provision of flight instruction for the LAPL(A) or PPL(A);
(2) the conduct of skill tests and proficiency checks for these licences;
(3) the training, testing and checking for the ratings or certificates attached to this licence.
Combining the two requirements, the only remunerated instruction you will be able to give is that leading to the issue, revalidation or renewal of a class rating attached to a PPL(A), a towing rating or aerobatic rating attached to an LAPL(A) or PPL(A) and the extension of LAPL(A) privileges to another class of aeroplane.
Not a great deal of money to be made there, I fear.