This is the 9391st most frequent Russian word.
тинькофф
Tinkoff: A Russian banking and financial services company.
"Тинькофф" is used here as the name of a bank, properly capitalized, indicating a specific organization.
"Тинькофф" сегодня предложил хорошие условия на вклад.
"Tinkoff" today offered good terms on a deposit.
"тинькофф" modifies "банка" (bank) in this sentence, directly referring to the organization.
Я недавно открыл кредитную карту тинькофф банка.
I recently opened a credit card with Tinkoff Bank.
"Тиньков" is used as a proper noun, indicating a specific individual, Oleg Tinkov, the founder of Tinkoff Bank.