Notes
Notes is a reference site for numbers that are easy to get wrong: what a platform actually keeps from a sale, what a form counts as one character, which date a rule is measured from. Every page answers a single question, names the primary source it was checked against together with the date of that check, and says plainly when a figure could not be verified. Eighteen pages in five clusters below.
Fees, payouts and what actually arrives
Six pages on what a platform, a card processor or a payout provider keeps, each one worked through on a concrete sale instead of a headline rate. Read them in that order: platform layer, processor layer, payout layer.
해외 후원·판매 플랫폼 수수료, 한국 거주자 기준으로 다시 계산하기
Stripe가 한국을 지원하지 않아 요율보다 정산 경로가 먼저 갈린다. PayPal 한국 판매자 요율 4.40% + $0.30로 100달러 판매를 경로별로 계산했다. (Korean)
→ Creator Payout CalculatorGumroad vs. Payhip fees: one rate includes the card fee, one doesn't
Put the card fee back in and "10% versus 5%" becomes 12.0% against 9.1% on a $25 sale. The three monthly-plan breakevens land at $966.67, $1,980 and $3,500.
→ Creator Payout CalculatorStripe vs. PayPal fees: why the gap depends on your price tag
The 19 cent difference in the fixed fee does most of the damage: PayPal costs 49% more on a $5 sale and only 22% more on a $200 one.
→ Creator Payout CalculatorPayoneer vs. PayPal: what it costs to actually receive the money
One $2,000 invoice followed to the bank costs 8.8% through PayPal and 2.2% to 5.0% through Payoneer, because one of them charges a percentage twice.
→ Creator Payout CalculatorKo-fi vs. Patreon: what each platform actually keeps
A tiered percentage of pledges against a flat rate with a $12-a-month opt-out. Two differently shaped models, so which one is cheaper moves with your income.
→ Creator Payout CalculatorWhat Lemon Squeezy actually charges
The advertised 5% + $0.50 is one line of as many as five, once cross-border, PayPal and subscription surcharges and a withdrawal fee are counted.
→ Creator Payout CalculatorCharacter limits and how text is counted
Four pages on what a platform or a form counts when it says "characters", and why the number your word processor shows is not that number.
자소서 글자수, 공백 포함인가 — 입력창이 실제로 세는 단위
같은 예문 하나가 세는 방법에 따라 78자에서 244바이트까지 흩어진다. 줄바꿈이 입력창에서 1자, 제출값에서 2자가 되는 이유를 규격 원문으로 확인했다. (Korean)
→ Character Limit CheckerTwitter/X character limit in 2026: history and why your emoji count differently
280 has held since 2017 for free accounts. The weighted-character rule underneath it charges Korean and Japanese text more per glyph than Latin text.
→ Character Limit CheckerDiscord embed character limits explained
An embed is not one text box with one ceiling. Six limits apply at the same time, including a 6,000-character total across every field.
→ Character Limit CheckerLinkedIn post character limit: where "see more" actually cuts it off
LinkedIn publishes no official number for a feed post, so this one reports what has been measured, and where the truncation falls.
→ Character Limit CheckerKorean rules, forms and scales
Two pages where the answer depends on a Korean statute or a Korean grading scale, checked against the statute text and the official form rather than a summary of it.
애플 구독 환불, 며칠 안에 되나 — 이용약관이 실제로 정한 조건
역일 7일에 일할 계산. 근거인 전자상거래법 제17조 원문, 환불 신청 4단계, 한국 거주자에게 준거법이 옮겨 가는 조항까지 확인했다. (Korean)
→ 한국 서비스 약관 쉬운 말 요약Convert a 4.5-scale Korean GPA to the US 4.0 scale
Three defensible methods turn the same transcript into three different numbers. Which one a form expects, and how far apart the answers land.
→ GPA 4.5 ConverterLeaving the service: dates, leave and paperwork
Four pages on the transition out of the US military, each figure quoted from the statute, regulation or instruction that sets it, with the date it was checked. Read them in that order: which date, how much leave, what the form says.
How many days of terminal leave can you actually take before ETS?
ETS date, terminal leave and last duty day get used as if they were one date. They are three, and this is how they chain together.
→ Army ETS Date CalculatorETS date vs. separation date: which one the paperwork actually uses
The DD Form 214 has no ETS block. It has block 13b, Separation Date this Period, and every 365-day and 180-day deadline in the transition counts from that date rather than from your last duty day.
→ Army ETS Date CalculatorWhat a terminal leave calculator needs before it can give you a number
Leave accrues at 2.5 days a month, carryover stops at 60 days a fiscal year, and a separate 60-day career ceiling governs selling it back. Two different limits, both 60.
→ Army ETS Date CalculatorYour DD214: when you get it, and how long a copy takes later
Regulation says it is delivered before you depart and the data reaches DMDC within a day. A replacement copy years later is a queue whose own guidance is not to follow up for 90 days.
→ Army ETS Date CalculatorOther single-question pages
Two questions that belong to no cluster: a fairness argument and a robots.txt rule.
Secret Santa generator vs. a random wheel: which one is actually fair?
A wheel can hand someone their own name. A ghost-leg ladder structurally cannot, and the difference is the mechanism rather than the randomness.
→ Ghost Leg PickerHow to block GPTBot and ClaudeBot with robots.txt
The rule is two lines, each company runs more than one crawler, and confirming the block took effect is the step most guides leave out.
→ AI Crawler Checker