Notes on data analytics, web development, Telegram bots, and automation.https://kovnerov.com/en-ushttps://kovnerov.com/writing/ai-receptionist-small-business/https://kovnerov.com/writing/ai-receptionist-small-business/An AI receptionist answers and books around the clock from $79 a month, against about $2,900 for a full-time desk. The 2026 cost table, task by task.Tue, 03 Nov 2026 00:00:00 GMThttps://kovnerov.com/writing/skolko-stoit-telegram-bot/https://kovnerov.com/writing/skolko-stoit-telegram-bot/A Telegram bot costs $0 to $150 a month on the major builders and the Bot API itself is free. The October 2026 price table inside shows the real ranges.Thu, 29 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/etsy-ai-policy-october-2026/https://kovnerov.com/writing/etsy-ai-policy-october-2026/Etsy's October 22, 2026 update bans AI patterns and bot-run listings, requires one unedited photo per listing, and keeps AI art legal with disclosure.Tue, 27 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/is-web-scraping-legal/https://kovnerov.com/writing/is-web-scraping-legal/Scraping law depends on method and data type: public pages or behind a login, facts or personal data. Three documents decide: law, terms, robots.txt.Thu, 22 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/amazon-scraping-rules/https://kovnerov.com/writing/amazon-scraping-rules/Amazon's robots.txt leaves product pages open to crawlers while its Conditions of Use ban data mining tools. Here is what each rule covers in practice.Thu, 15 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/etsy-fee-calculator-extension/https://kovnerov.com/writing/etsy-fee-calculator-extension/This Chrome extension puts the full 2026 Etsy fee breakdown, tariff line included, under the price of any listing. One permission, zero network calls.Mon, 12 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/etsy-fee-calculator-guide/https://kovnerov.com/writing/etsy-fee-calculator-guide/An honest Etsy fee calculator counts six lines in 2026: transaction, processing, listing, Offsite Ads, the DDP tariff charge, and Etsy's 15% fee on it.Tue, 06 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/etsy-tariff-calculator-guide/https://kovnerov.com/writing/etsy-tariff-calculator-guide/Etsy tariffs in 2026: since July 9, US orders ship DDP, the tariff is baked into the item price, and Etsy takes 15% of the tariff money. Here is the math.Thu, 01 Oct 2026 00:00:00 GMThttps://kovnerov.com/writing/missed-call-text-back/https://kovnerov.com/writing/missed-call-text-back/Missed call text back is an automation that texts a caller within seconds after nobody picks up. How it works, the US carrier rules, and 2026 pricing.Tue, 22 Sep 2026 00:00:00 GMThttps://kovnerov.com/writing/etsy-komissii-2026/https://kovnerov.com/writing/etsy-komissii-2026/$0.20 per listing, 3% plus $0.25 on US sales, Offsite Ads at 15% or 12%; since July 9, 2026, US orders also carry the DDP tariff charge.Fri, 18 Sep 2026 00:00:00 GMThttps://kovnerov.com/writing/perenos-telegram-bota-v-max/https://kovnerov.com/writing/perenos-telegram-bota-v-max/Porting a Telegram bot to MAX in 2026: logic and CRM hooks move over whole, only the Bot API layer and payments get rebuilt. The code takes days.Sat, 22 Aug 2026 00:00:00 GMThttps://kovnerov.com/writing/kak-sdelat-kartochki-marketpleysov/https://kovnerov.com/writing/kak-sdelat-kartochki-marketpleysov/How to build a marketplace product card for Wildberries, Ozon, and Yandex.Market: cover photo, infographic, title, description, and specs. Step by step.Thu, 13 Aug 2026 00:00:00 GMThttps://kovnerov.com/writing/what-i-write-about/https://kovnerov.com/writing/what-i-write-about/The ten pages search sends the most people to: Etsy fees and tariffs in 2026, what the scraping rules allow, and the free calculators that go with them.Wed, 12 Aug 2026 00:00:00 GMT