Just had a 'cold call' from The Times subscription Dept offering me £25 M&S Voucher for taking The Times and Sunday Times and having it delivered (must at least take Sunday Times for £2 and one other day - weekdays 65p I think). Direct debit to bank account required. No minimum term. Voucher is delivered after a week, with confirmation letter. Believe delivery is free; offer may be restricted to those living within M25 (both to be confirmed). This offer is available to new or previous subscribers. Call 020 7903 3000; I spoke to Harry. Can't see it online.
I saw similar offer in The Times a few months ago, took out the minimum subscription which was then Saturday Times only, and got the £25 voucher after three weeks, at which point I cancelled!