Most buses will already have ITSO readers installed since Concessionary Travel Passes for the disabled are ITSO smartcards (well, my Welsh one has an ITSO logo on the back anyway). Actually, I do wonder why Concessionary Travel Passes are smart cards since surely waving a non-smart card in the direction of the driver would work, since you don't need money on the card to pay a fare. I suppose it could be that the government doesn't trust bus operators to supply correct passenger numbers for reinbursment, or just an anti-forgery tactic.
It also allows cards to be blacklisted easily to prevent fraudulent use, e.g. in the event of a loss or theft.
On the
Oyster▸ system, a card reported as lost will work for a maximum of 24 hours, as every bus and gateline synchronises with the central Oyster system at least once a day. Once the card has been "locked" out of use by one reader, it won't work again even if the buses used later haven't yet received the update.
My biggest priority for bus companies is getting the fares online. I've been to various countries recently and found the fare easily (even if the site isn't in English) before arriving in the country. You simply couldn't do that in most places in the
UK▸ . In Glasgow, First even advertise "exact fare only, no change given" on the bus stop but fail to tell you the fare. Almost felt like going into a bank and changing my ^5 note into 5p pieces to make up any fare ... but instead I just walked as it seemed like an easier option. Quite sad really that this has to be the case if you don't have any small change.