A summary of what actually matters.
SET UP PROPERLY
Join, read the terms, test your link, keep your contact details current, enable two-factor authentication.
CHOOSE THE RIGHT APPROACH
If you build sites for clients, refer them naturally and take the commission as credit against your own hosting. Effort: near zero. If you want affiliate income as a business, treat it as a content business and expect it to take a year. If you host many client sites, consider whether reseller hosting suits you better.
WRITE CONTENT THAT WOULD STAND WITHOUT THE LINK
Useful, specific, honest about limitations, aimed at people who actually need hosting.
DISCLOSE
Always. It is fairer, often required, and costs almost nothing in conversions.
MAINTAIN WHAT WORKS
One or two pieces will produce most of your referrals. Keep them accurate and build on them.
REVIEW ANNUALLY
Cleared commission, what produced it, and whether the effort is justified.
ASK BEFORE ACTING
If you are unsure whether something is within the terms, a ticket takes a minute and prevents a forfeited balance.